76664077 has 6 divisors (see below), whose sum is σ = 89180718. Its totient is φ = 65712024.

The previous prime is 76664051. The next prime is 76664099. The reversal of 76664077 is 77046667.

It can be written as a sum of positive squares in only one way, i.e., 73170916 + 3493161 = 8554^2 + 1869^2 .

It is not a de Polignac number, because 76664077 - 2¹⁵ = 76631309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76664177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 782238 + ... + 782335.

It is an arithmetic number, because the mean of its divisors is an integer number (14863453).

Almost surely, 2^76664077 is an apocalyptic number.

It is an amenable number.

76664077 is a deficient number, since it is larger than the sum of its proper divisors (12516641).

76664077 is a wasteful number, since it uses less digits than its factorization.

76664077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564587 (or 1564580 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 76664077 is about 8755.8024760727. The cubic root of 76664077 is about 424.8125161524.

The spelling of 76664077 in words is "seventy-six million, six hundred sixty-four thousand, seventy-seven".