76522721 has 8 divisors (see below), whose sum is σ = 85256064. Its totient is φ = 68085520.

The previous prime is 76522703. The next prime is 76522727. The reversal of 76522721 is 12722567.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76522721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76522727) 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, 73490 + ... + 74523.

It is an arithmetic number, because the mean of its divisors is an integer number (10657008).

Almost surely, 2^76522721 is an apocalyptic number.

It is an amenable number.

76522721 is a deficient number, since it is larger than the sum of its proper divisors (8733343).

76522721 is a wasteful number, since it uses less digits than its factorization.

76522721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148071.

The product of its digits is 11760, while the sum is 32.

The square root of 76522721 is about 8747.7266189565. The cubic root of 76522721 is about 424.5512606180.

The spelling of 76522721 in words is "seventy-six million, five hundred twenty-two thousand, seven hundred twenty-one".