64978968 has 16 divisors (see below), whose sum is σ = 162447480. Its totient is φ = 21659648.

The previous prime is 64978967. The next prime is 64978997. The reversal of 64978968 is 86987946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64978961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353705 + ... + 1353752.

Almost surely, 2^64978968 is an apocalyptic number.

It is an amenable number.

64978968 is an abundant number, since it is smaller than the sum of its proper divisors (97468512).

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

64978968 is a wasteful number, since it uses less digits than its factorization.

64978968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707466 (or 2707462 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 57.

The square root of 64978968 is about 8060.9532935007. The cubic root of 64978968 is about 402.0292050761.

The spelling of 64978968 in words is "sixty-four million, nine hundred seventy-eight thousand, nine hundred sixty-eight".