76660072 has 32 divisors (see below), whose sum is σ = 152598600. Its totient is φ = 35979264.

The previous prime is 76660069. The next prime is 76660091. The reversal of 76660072 is 27006667.

It can be written as a sum of positive squares in 4 ways, for example, as 76632516 + 27556 = 8754^2 + 166^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

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, 99304 + ... + 100072.

Almost surely, 2^76660072 is an apocalyptic number.

It is an amenable number.

76660072 is a deficient number, since it is larger than the sum of its proper divisors (75938528).

76660072 is a wasteful number, since it uses less digits than its factorization.

76660072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525 (or 1521 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 76660072 is about 8755.5737676066. The cubic root of 76660072 is about 424.8051184949.

The spelling of 76660072 in words is "seventy-six million, six hundred sixty thousand, seventy-two".