64994976 has 72 divisors (see below), whose sum is σ = 187125120. Its totient is φ = 21396096.

The previous prime is 64994939. The next prime is 64994983. The reversal of 64994976 is 67949946.

64994976 is a `hidden beast` number, since 64 + 99 + 497 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 22545 + ... + 25263.

It is an arithmetic number, because the mean of its divisors is an integer number (2598960).

Almost surely, 2^64994976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64994976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93562560).

64994976 is an abundant number, since it is smaller than the sum of its proper divisors (122130144).

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

64994976 is a wasteful number, since it uses less digits than its factorization.

With its successor (64994977) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (2807).

64994976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2807 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 64994976 is about 8061.9461670244. The cubic root of 64994976 is about 402.0622165529.

The spelling of 64994976 in words is "sixty-four million, nine hundred ninety-four thousand, nine hundred seventy-six".