65509697 has 8 divisors (see below), whose sum is σ = 71547840. Its totient is φ = 59485360.

The previous prime is 65509693. The next prime is 65509699. The reversal of 65509697 is 79690556.

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

It is not a de Polignac number, because 65509697 - 2² = 65509693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65509693) 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, 8204 + ... + 14082.

It is an arithmetic number, because the mean of its divisors is an integer number (8943480).

Almost surely, 2^65509697 is an apocalyptic number.

It is an amenable number.

65509697 is a deficient number, since it is larger than the sum of its proper divisors (6038143).

65509697 is a wasteful number, since it uses less digits than its factorization.

65509697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6903.

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 65509697 is about 8093.8060886087. The cubic root of 65509697 is about 403.1207904294.

The spelling of 65509697 in words is "sixty-five million, five hundred nine thousand, six hundred ninety-seven".