77668587 has 12 divisors (see below), whose sum is σ = 115220560. Its totient is φ = 50379408.

The previous prime is 77668567. The next prime is 77668589. The reversal of 77668587 is 78586677.

It is not a de Polignac number, because 77668587 - 2¹⁶ = 77603051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77668589) 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 11 ways as a sum of consecutive naturals, for example, 116287 + ... + 116952.

Almost surely, 2^77668587 is an apocalyptic number.

77668587 is a deficient number, since it is larger than the sum of its proper divisors (37551973).

77668587 is a wasteful number, since it uses less digits than its factorization.

77668587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233282 (or 233279 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 77668587 is about 8812.9783274441. The cubic root of 77668587 is about 426.6598746342.

The spelling of 77668587 in words is "seventy-seven million, six hundred sixty-eight thousand, five hundred eighty-seven".