65615601 has 8 divisors (see below), whose sum is σ = 87545920. Its totient is φ = 43714512.

The previous prime is 65615593. The next prime is 65615617. The reversal of 65615601 is 10651656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65615601 - 2³ = 65615593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65615651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381 + ... + 11538.

It is an arithmetic number, because the mean of its divisors is an integer number (10943240).

Almost surely, 2^65615601 is an apocalyptic number.

It is an amenable number.

65615601 is a deficient number, since it is larger than the sum of its proper divisors (21930319).

65615601 is a wasteful number, since it uses less digits than its factorization.

65615601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14615.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 65615601 is about 8100.3457333622. The cubic root of 65615601 is about 403.3379039317.

The spelling of 65615601 in words is "sixty-five million, six hundred fifteen thousand, six hundred one".