76821725 has 48 divisors (see below), whose sum is σ = 109278720. Its totient is φ = 53222400.

The previous prime is 76821721. The next prime is 76821727. The reversal of 76821725 is 52712867.

It is not a de Polignac number, because 76821725 - 2² = 76821721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76821721) 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 47 ways as a sum of consecutive naturals, for example, 283340 + ... + 283610.

It is an arithmetic number, because the mean of its divisors is an integer number (2276640).

Almost surely, 2^76821725 is an apocalyptic number.

It is an amenable number.

76821725 is a deficient number, since it is larger than the sum of its proper divisors (32456995).

76821725 is a wasteful number, since it uses less digits than its factorization.

76821725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 345 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 76821725 is about 8764.8003399963. The cubic root of 76821725 is about 425.1035042024.

The spelling of 76821725 in words is "seventy-six million, eight hundred twenty-one thousand, seven hundred twenty-five".