65461601 has 4 divisors (see below), whose sum is σ = 66534804. Its totient is φ = 64388400.

The previous prime is 65461597. The next prime is 65461603. The reversal of 65461601 is 10616456.

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 11424400 + 54037201 = 3380^2 + 7351^2 .

It is a cyclic number.

It is not a de Polignac number, because 65461601 - 2² = 65461597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65461603) 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, 536510 + ... + 536631.

It is an arithmetic number, because the mean of its divisors is an integer number (16633701).

Almost surely, 2^65461601 is an apocalyptic number.

65461601 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

65461601 is a deficient number, since it is larger than the sum of its proper divisors (1073203).

65461601 is a wasteful number, since it uses less digits than its factorization.

65461601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073202.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 65461601 is about 8090.8343821883. The cubic root of 65461601 is about 403.0221116828.

The spelling of 65461601 in words is "sixty-five million, four hundred sixty-one thousand, six hundred one".