76651821 has 12 divisors (see below), whose sum is σ = 110813248. Its totient is φ = 51057864.

The previous prime is 76651781. The next prime is 76651823. The reversal of 76651821 is 12815667.

It is not a de Polignac number, because 76651821 - 2⁷ = 76651693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76651823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10476 + ... + 16218.

Almost surely, 2^76651821 is an apocalyptic number.

It is an amenable number.

76651821 is a deficient number, since it is larger than the sum of its proper divisors (34161427).

76651821 is a wasteful number, since it uses less digits than its factorization.

76651821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232 (or 7229 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 76651821 is about 8755.1025693592. The cubic root of 76651821 is about 424.7898772152.

The spelling of 76651821 in words is "seventy-six million, six hundred fifty-one thousand, eight hundred twenty-one".