77077985 has 8 divisors (see below), whose sum is σ = 93358656. Its totient is φ = 61085680.

The previous prime is 77077963. The next prime is 77078021. The reversal of 77077985 is 58977077.

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

It is not a de Polignac number, because 77077985 - 2⁶ = 77077921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71501 + ... + 72570.

It is an arithmetic number, because the mean of its divisors is an integer number (11669832).

Almost surely, 2^77077985 is an apocalyptic number.

It is an amenable number.

77077985 is a deficient number, since it is larger than the sum of its proper divisors (16280671).

77077985 is a wasteful number, since it uses less digits than its factorization.

77077985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144183.

The product of its (nonzero) digits is 864360, while the sum is 50.

The square root of 77077985 is about 8779.4068706263. The cubic root of 77077985 is about 425.5756628188.

The spelling of 77077985 in words is "seventy-seven million, seventy-seven thousand, nine hundred eighty-five".