77668287 has 8 divisors (see below), whose sum is σ = 103628160. Its totient is φ = 51743640.

The previous prime is 77668273. The next prime is 77668289. The reversal of 77668287 is 78286677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77668287 - 2⁴ = 77668271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77668289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (12953520).

Almost surely, 2^77668287 is an apocalyptic number.

77668287 is a deficient number, since it is larger than the sum of its proper divisors (25959873).

77668287 is a wasteful number, since it uses less digits than its factorization.

77668287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17613.

The product of its digits is 1580544, while the sum is 51.

The square root of 77668287 is about 8812.9613070749. The cubic root of 77668287 is about 426.6593252996.

The spelling of 77668287 in words is "seventy-seven million, six hundred sixty-eight thousand, two hundred eighty-seven".