76921670 has 48 divisors (see below), whose sum is σ = 162149040. Its totient is φ = 26195904.

The previous prime is 76921619. The next prime is 76921673. The reversal of 76921670 is 7612967.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76921673) 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, 87272 + ... + 88148.

It is an arithmetic number, because the mean of its divisors is an integer number (3378105).

Almost surely, 2^76921670 is an apocalyptic number.

76921670 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a pronic number, being equal to 8770×8771.

76921670 is an abundant number, since it is smaller than the sum of its proper divisors (85227370).

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

76921670 is a wasteful number, since it uses less digits than its factorization.

76921670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 76921670 is about 8770.4999857477. The cubic root of 76921670 is about 425.2877774136.

The spelling of 76921670 in words is "seventy-six million, nine hundred twenty-one thousand, six hundred seventy".