65664370 has 32 divisors (see below), whose sum is σ = 128214576. Its totient is φ = 24115200.

The previous prime is 65664341. The next prime is 65664383. The reversal of 65664370 is 7346656.

It can be written as a sum of positive squares in 8 ways, for example, as 14584761 + 51079609 = 3819^2 + 7147^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2260 + ... + 11680.

Almost surely, 2^65664370 is an apocalyptic number.

65664370 is a deficient number, since it is larger than the sum of its proper divisors (62550206).

65664370 is a wasteful number, since it uses less digits than its factorization.

65664370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 65664370 is about 8103.3554778252. The cubic root of 65664370 is about 403.4378065696.

The spelling of 65664370 in words is "sixty-five million, six hundred sixty-four thousand, three hundred seventy".