77668659 has 16 divisors (see below), whose sum is σ = 115239040. Its totient is φ = 51700680.

The previous prime is 77668651. The next prime is 77668673. The reversal of 77668659 is 95686677.

It is a happy number.

It is not a de Polignac number, because 77668659 - 2³ = 77668651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77668651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20124 + ... + 23670.

It is an arithmetic number, because the mean of its divisors is an integer number (7202440).

Almost surely, 2^77668659 is an apocalyptic number.

77668659 is a deficient number, since it is larger than the sum of its proper divisors (37570381).

77668659 is a wasteful number, since it uses less digits than its factorization.

77668659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367 (or 4361 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 77668659 is about 8812.9824123278. The cubic root of 77668659 is about 426.6600064743.

The spelling of 77668659 in words is "seventy-seven million, six hundred sixty-eight thousand, six hundred fifty-nine".