76661072 has 20 divisors (see below), whose sum is σ = 148693236. Its totient is φ = 38288640.

The previous prime is 76661063. The next prime is 76661083. The reversal of 76661072 is 27016667.

It can be written as a sum of positive squares in 2 ways, for example, as 56911936 + 19749136 = 7544^2 + 4444^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16868 + ... + 20924.

Almost surely, 2^76661072 is an apocalyptic number.

It is an amenable number.

76661072 is a deficient number, since it is larger than the sum of its proper divisors (72032164).

76661072 is a wasteful number, since it uses less digits than its factorization.

76661072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246 (or 5240 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 76661072 is about 8755.6308739005. The cubic root of 76661072 is about 424.8069656245.

The spelling of 76661072 in words is "seventy-six million, six hundred sixty-one thousand, seventy-two".