64697976 has 96 divisors (see below), whose sum is σ = 201932640. Its totient is φ = 18330624.

The previous prime is 64697957. The next prime is 64697977. The reversal of 64697976 is 67979646.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64697977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68580 + ... + 69516.

It is an arithmetic number, because the mean of its divisors is an integer number (2103465).

Almost surely, 2^64697976 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 64697976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100966320).

64697976 is an abundant number, since it is smaller than the sum of its proper divisors (137234664).

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

64697976 is a wasteful number, since it uses less digits than its factorization.

64697976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1086 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 64697976 is about 8043.5052060653. The cubic root of 64697976 is about 401.4488623252.

The spelling of 64697976 in words is "sixty-four million, six hundred ninety-seven thousand, nine hundred seventy-six".