76721552 has 10 divisors (see below), whose sum is σ = 148648038. Its totient is φ = 38360768.

The previous prime is 76721549. The next prime is 76721569. The reversal of 76721552 is 25512767.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 54405376 + 22316176 = 7376^2 + 4724^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2397533 + ... + 2397564.

Almost surely, 2^76721552 is an apocalyptic number.

It is an amenable number.

76721552 is a deficient number, since it is larger than the sum of its proper divisors (71926486).

76721552 is a wasteful number, since it uses less digits than its factorization.

76721552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795105 (or 4795099 counting only the distinct ones).

The product of its digits is 29400, while the sum is 35.

The square root of 76721552 is about 8759.0839703704. The cubic root of 76721552 is about 424.9186501737.

The spelling of 76721552 in words is "seventy-six million, seven hundred twenty-one thousand, five hundred fifty-two".