64990976 has 18 divisors (see below), whose sum is σ = 129728592. Its totient is φ = 32495360.

The previous prime is 64990957. The next prime is 64990993. The reversal of 64990976 is 67909946.

It is a super-2 number, since 2×64990976² = 8447653922865152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126680 + ... + 127191.

It is an arithmetic number, because the mean of its divisors is an integer number (7207144).

Almost surely, 2^64990976 is an apocalyptic number.

It is an amenable number.

64990976 is a deficient number, since it is larger than the sum of its proper divisors (64737616).

64990976 is an equidigital number, since it uses as much as digits as its factorization.

64990976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253887 (or 253873 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 64990976 is about 8061.6980841508. The cubic root of 64990976 is about 402.0539683161.

The spelling of 64990976 in words is "sixty-four million, nine hundred ninety thousand, nine hundred seventy-six".