65664366 has 16 divisors (see below), whose sum is σ = 131412864. Its totient is φ = 21874104.

The previous prime is 65664341. The next prime is 65664383. The reversal of 65664366 is 66346656.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11751 + ... + 16413.

It is an arithmetic number, because the mean of its divisors is an integer number (8213304).

Almost surely, 2^65664366 is an apocalyptic number.

65664366 is an abundant number, since it is smaller than the sum of its proper divisors (65748498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65664366 is a wasteful number, since it uses less digits than its factorization.

65664366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7015.

The product of its digits is 466560, while the sum is 42.

The square root of 65664366 is about 8103.3552310139. The cubic root of 65664366 is about 403.4377983777.

The spelling of 65664366 in words is "sixty-five million, six hundred sixty-four thousand, three hundred sixty-six".