64979964 has 36 divisors (see below), whose sum is σ = 187720624. Its totient is φ = 18565632.

The previous prime is 64979963. The next prime is 64979969. The reversal of 64979964 is 46997946.

64979964 is a `hidden beast` number, since 6 + 497 + 99 + 64 = 666.

64979964 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

64979964 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 64979964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64979963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128677 + ... + 129180.

Almost surely, 2^64979964 is an apocalyptic number.

It is an amenable number.

64979964 is an abundant number, since it is smaller than the sum of its proper divisors (122740660).

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

64979964 is a wasteful number, since it uses less digits than its factorization.

64979964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257874 (or 257869 counting only the distinct ones).

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

The square root of 64979964 is about 8061.0150725575. The cubic root of 64979964 is about 402.0312591717.

It can be divided in two parts, 6497 and 9964, that added together give a palindrome (16461).

The spelling of 64979964 in words is "sixty-four million, nine hundred seventy-nine thousand, nine hundred sixty-four".