76764321 has 16 divisors (see below), whose sum is σ = 113896320. Its totient is φ = 51099120.

The previous prime is 76764287. The next prime is 76764383. The reversal of 76764321 is 12346767.

76764321 is a `hidden beast` number, since 7 + 6 + 7 + 643 + 2 + 1 = 666.

It is not a de Polignac number, because 76764321 - 2⁶ = 76764257 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (76764521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20436 + ... + 23898.

It is an arithmetic number, because the mean of its divisors is an integer number (7118520).

Almost surely, 2^76764321 is an apocalyptic number.

It is an amenable number.

76764321 is a deficient number, since it is larger than the sum of its proper divisors (37131999).

76764321 is a wasteful number, since it uses less digits than its factorization.

76764321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293 (or 4287 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 76764321 is about 8761.5250384850. The cubic root of 76764321 is about 424.9975935273.

The spelling of 76764321 in words is "seventy-six million, seven hundred sixty-four thousand, three hundred twenty-one".