76721827 has 16 divisors (see below), whose sum is σ = 95497920. Its totient is φ = 60014592.

The previous prime is 76721809. The next prime is 76721837. The reversal of 76721827 is 72812767.

It is a cyclic number.

It is not a de Polignac number, because 76721827 - 2²³ = 68333219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76721827.

It is not an unprimeable number, because it can be changed into a prime (76721837) 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 15 ways as a sum of consecutive naturals, for example, 3363 + ... + 12835.

It is an arithmetic number, because the mean of its divisors is an integer number (5968620).

Almost surely, 2^76721827 is an apocalyptic number.

76721827 is a deficient number, since it is larger than the sum of its proper divisors (18776093).

76721827 is a wasteful number, since it uses less digits than its factorization.

76721827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582.

The product of its digits is 65856, while the sum is 40.

The square root of 76721827 is about 8759.0996683449. The cubic root of 76721827 is about 424.9191578645.

The spelling of 76721827 in words is "seventy-six million, seven hundred twenty-one thousand, eight hundred twenty-seven".