65665497 has 8 divisors (see below), whose sum is σ = 87656256. Its totient is φ = 43725872.

The previous prime is 65665493. The next prime is 65665513. The reversal of 65665497 is 79456656.

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

It is a cyclic number.

It is not a de Polignac number, because 65665497 - 2² = 65665493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65665493) 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, 9678 + ... + 14999.

It is an arithmetic number, because the mean of its divisors is an integer number (10957032).

Almost surely, 2^65665497 is an apocalyptic number.

It is an amenable number.

65665497 is a deficient number, since it is larger than the sum of its proper divisors (21990759).

65665497 is a wasteful number, since it uses less digits than its factorization.

65665497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25567.

The product of its digits is 1360800, while the sum is 48.

The square root of 65665497 is about 8103.4250166211. The cubic root of 65665497 is about 403.4401146291.

The spelling of 65665497 in words is "sixty-five million, six hundred sixty-five thousand, four hundred ninety-seven".