77696525 has 6 divisors (see below), whose sum is σ = 96343722. Its totient is φ = 62157200.

The previous prime is 77696471. The next prime is 77696527. The reversal of 77696525 is 52569677.

It can be written as a sum of positive squares in 3 ways, for example, as 27556 + 77668969 = 166^2 + 8813^2 .

It is not a de Polignac number, because 77696525 - 2¹² = 77692429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77696525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77696527) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 1553906 + ... + 1553955.

It is an arithmetic number, because the mean of its divisors is an integer number (16057287).

Almost surely, 2^77696525 is an apocalyptic number.

It is an amenable number.

77696525 is a deficient number, since it is larger than the sum of its proper divisors (18647197).

77696525 is a wasteful number, since it uses less digits than its factorization.

77696525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107871 (or 3107866 counting only the distinct ones).

The product of its digits is 793800, while the sum is 47.

The square root of 77696525 is about 8814.5632336492. The cubic root of 77696525 is about 426.7110261361.

The spelling of 77696525 in words is "seventy-seven million, six hundred ninety-six thousand, five hundred twenty-five".