65601901 has 4 divisors (see below), whose sum is σ = 66677404. Its totient is φ = 64526400.

The previous prime is 65601853. The next prime is 65601937. The reversal of 65601901 is 10910656.

65601901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2399401 + 63202500 = 1549^2 + 7950^2 .

It is a cyclic number.

It is not a de Polignac number, because 65601901 - 2¹⁹ = 65077613 is a prime.

It is the 8100-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65601901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65607901) by changing a digit.

It is a nontrivial repunit in base 8099.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537660 + ... + 537781.

It is an arithmetic number, because the mean of its divisors is an integer number (16669351).

Almost surely, 2^65601901 is an apocalyptic number.

65601901 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

65601901 is a deficient number, since it is larger than the sum of its proper divisors (1075503).

65601901 is a wasteful number, since it uses less digits than its factorization.

65601901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075502.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 65601901 is about 8099.5000462992. The cubic root of 65601901 is about 403.3098307610.

The spelling of 65601901 in words is "sixty-five million, six hundred one thousand, nine hundred one".