65605901 has 4 divisors (see below), whose sum is σ = 66207900. Its totient is φ = 65003904.

The previous prime is 65605877. The next prime is 65605919. The reversal of 65605901 is 10950656.

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 44903401 + 20702500 = 6701^2 + 4550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65605901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65605961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300836 + ... + 301053.

It is an arithmetic number, because the mean of its divisors is an integer number (16551975).

Almost surely, 2^65605901 is an apocalyptic number.

It is an amenable number.

65605901 is a deficient number, since it is larger than the sum of its proper divisors (601999).

65605901 is a wasteful number, since it uses less digits than its factorization.

65605901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601998.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 65605901 is about 8099.7469713566. The cubic root of 65605901 is about 403.3180277111.

The spelling of 65605901 in words is "sixty-five million, six hundred five thousand, nine hundred one".