76685664 has 96 divisors (see below), whose sum is σ = 222082560. Its totient is φ = 22976000.

The previous prime is 76685639. The next prime is 76685669. The reversal of 76685664 is 46658667.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76685669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106297 + ... + 107015.

It is an arithmetic number, because the mean of its divisors is an integer number (2313360).

Almost surely, 2^76685664 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 76685664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111041280).

76685664 is an abundant number, since it is smaller than the sum of its proper divisors (145396896).

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

76685664 is a wasteful number, since it uses less digits than its factorization.

76685664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 836 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 76685664 is about 8757.0351146949. The cubic root of 76685664 is about 424.8523851826.

The spelling of 76685664 in words is "seventy-six million, six hundred eighty-five thousand, six hundred sixty-four".