77625077 has 4 divisors (see below), whose sum is σ = 82191276. Its totient is φ = 73058880.

The previous prime is 77625071. The next prime is 77625091. The reversal of 77625077 is 77052677.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55965361 + 21659716 = 7481^2 + 4654^2 .

It is a cyclic number.

It is not a de Polignac number, because 77625077 - 2¹² = 77620981 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 (77625071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2283074 + ... + 2283107.

It is an arithmetic number, because the mean of its divisors is an integer number (20547819).

Almost surely, 2^77625077 is an apocalyptic number.

It is an amenable number.

77625077 is a deficient number, since it is larger than the sum of its proper divisors (4566199).

77625077 is a wasteful number, since it uses less digits than its factorization.

77625077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566198.

The product of its (nonzero) digits is 144060, while the sum is 41.

The square root of 77625077 is about 8810.5094631355. The cubic root of 77625077 is about 426.5801880262.

The spelling of 77625077 in words is "seventy-seven million, six hundred twenty-five thousand, seventy-seven".