77687051 has 8 divisors (see below), whose sum is σ = 83907600. Its totient is φ = 71501472.

The previous prime is 77687047. The next prime is 77687053. The reversal of 77687051 is 15078677.

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

It is a cyclic number.

It is not a de Polignac number, because 77687051 - 2² = 77687047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77687053) 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 7 ways as a sum of consecutive naturals, for example, 4025 + ... + 13098.

It is an arithmetic number, because the mean of its divisors is an integer number (10488450).

Almost surely, 2^77687051 is an apocalyptic number.

77687051 is a deficient number, since it is larger than the sum of its proper divisors (6220549).

77687051 is a wasteful number, since it uses less digits than its factorization.

77687051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17485.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 77687051 is about 8814.0258111716. The cubic root of 77687051 is about 426.6936816255.

The spelling of 77687051 in words is "seventy-seven million, six hundred eighty-seven thousand, fifty-one".