77668487 has 16 divisors (see below), whose sum is σ = 85905792. Its totient is φ = 69772800.

The previous prime is 77668471. The next prime is 77668499. The reversal of 77668487 is 78486677.

It is a cyclic number.

It is not a de Polignac number, because 77668487 - 2⁴ = 77668471 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 (77668457) 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, 193487 + ... + 193887.

It is an arithmetic number, because the mean of its divisors is an integer number (5369112).

Almost surely, 2^77668487 is an apocalyptic number.

77668487 is a deficient number, since it is larger than the sum of its proper divisors (8237305).

77668487 is a wasteful number, since it uses less digits than its factorization.

77668487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778.

The product of its digits is 3161088, while the sum is 53.

The square root of 77668487 is about 8812.9726539914. The cubic root of 77668487 is about 426.6596915228.

The spelling of 77668487 in words is "seventy-seven million, six hundred sixty-eight thousand, four hundred eighty-seven".