77668851 has 24 divisors (see below), whose sum is σ = 112728000. Its totient is φ = 47545056.

The previous prime is 77668847. The next prime is 77668859. The reversal of 77668851 is 15886677.

It is not a de Polignac number, because 77668851 - 2² = 77668847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77668851.

It is not an unprimeable number, because it can be changed into a prime (77668859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155400 + ... + 155898.

It is an arithmetic number, because the mean of its divisors is an integer number (4697000).

Almost surely, 2^77668851 is an apocalyptic number.

77668851 is a deficient number, since it is larger than the sum of its proper divisors (35059149).

77668851 is a wasteful number, since it uses less digits than its factorization.

77668851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 822 counting only the distinct ones).

The product of its digits is 564480, while the sum is 48.

The square root of 77668851 is about 8812.9933053418. The cubic root of 77668851 is about 426.6603580475.

The spelling of 77668851 in words is "seventy-seven million, six hundred sixty-eight thousand, eight hundred fifty-one".