76642251 has 16 divisors (see below), whose sum is σ = 117446400. Its totient is φ = 43548768.

The previous prime is 76642231. The next prime is 76642271. The reversal of 76642251 is 15224667.

It is an interprime number because it is at equal distance from previous prime (76642231) and next prime (76642271).

It is not a de Polignac number, because 76642251 - 2⁷ = 76642123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76642231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6436 + ... + 13953.

It is an arithmetic number, because the mean of its divisors is an integer number (7340400).

Almost surely, 2^76642251 is an apocalyptic number.

76642251 is a deficient number, since it is larger than the sum of its proper divisors (40804149).

76642251 is a wasteful number, since it uses less digits than its factorization.

76642251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20578.

The product of its digits is 20160, while the sum is 33.

The square root of 76642251 is about 8754.5560138707. The cubic root of 76642251 is about 424.7721981035.

The spelling of 76642251 in words is "seventy-six million, six hundred forty-two thousand, two hundred fifty-one".