677985771 has 8 divisors (see below), whose sum is σ = 906070480. Its totient is φ = 450945792.

The previous prime is 677985769. The next prime is 677985787. The reversal of 677985771 is 177589776.

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

It is not a de Polignac number, because 677985771 - 2¹ = 677985769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677985731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259666 + ... + 262263.

It is an arithmetic number, because the mean of its divisors is an integer number (113258810).

Almost surely, 2^677985771 is an apocalyptic number.

677985771 is a deficient number, since it is larger than the sum of its proper divisors (228084709).

677985771 is a wasteful number, since it uses less digits than its factorization.

677985771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522365.

The product of its digits is 5186160, while the sum is 57.

The square root of 677985771 is about 26038.1599004231. The cubic root of 677985771 is about 878.4968186871.

The spelling of 677985771 in words is "six hundred seventy-seven million, nine hundred eighty-five thousand, seven hundred seventy-one".