76991820676 has 27 divisors (see below), whose sum is σ = 143145068367. Its totient is φ = 36227005440.

The previous prime is 76991820673. The next prime is 76991820709. The reversal of 76991820676 is 67602819967.

The square root of 76991820676 is 277474.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2038522500 + 74953298176 = 45150^2 + 273776^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76991820673) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9430036 + ... + 9438196.

Almost surely, 2^76991820676 is an apocalyptic number.

76991820676 is the 277474-th square number.

It is an amenable number.

76991820676 is a deficient number, since it is larger than the sum of its proper divisors (66153247691).

76991820676 is an frugal number, since it uses more digits than its factorization.

76991820676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16360 (or 8180 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 76991820676 in words is "seventy-six billion, nine hundred ninety-one million, eight hundred twenty thousand, six hundred seventy-six".