76502721 has 8 divisors (see below), whose sum is σ = 107372320. Its totient is φ = 48317472.

The previous prime is 76502693. The next prime is 76502747. The reversal of 76502721 is 12720567.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 76502721 - 2⁵ = 76502689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76501721) 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 7 ways as a sum of consecutive naturals, for example, 671020 + ... + 671133.

It is an arithmetic number, because the mean of its divisors is an integer number (13421540).

Almost surely, 2^76502721 is an apocalyptic number.

It is an amenable number.

76502721 is a deficient number, since it is larger than the sum of its proper divisors (30869599).

76502721 is a wasteful number, since it uses less digits than its factorization.

76502721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342175.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 76502721 is about 8746.5833901015. The cubic root of 76502721 is about 424.5142704494.

The spelling of 76502721 in words is "seventy-six million, five hundred two thousand, seven hundred twenty-one".