76966821 has 8 divisors (see below), whose sum is σ = 114024960. Its totient is φ = 51311196.

The previous prime is 76966801. The next prime is 76966849. The reversal of 76966821 is 12866967.

It is not a de Polignac number, because 76966821 - 2⁵ = 76966789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76966801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1425285 + ... + 1425338.

It is an arithmetic number, because the mean of its divisors is an integer number (14253120).

Almost surely, 2^76966821 is an apocalyptic number.

It is an amenable number.

76966821 is a deficient number, since it is larger than the sum of its proper divisors (37058139).

76966821 is a wasteful number, since it uses less digits than its factorization.

76966821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850632 (or 2850626 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 76966821 is about 8773.0736347075. The cubic root of 76966821 is about 425.3709720565.

The spelling of 76966821 in words is "seventy-six million, nine hundred sixty-six thousand, eight hundred twenty-one".