877077666 has 32 divisors (see below), whose sum is σ = 1950094080. Its totient is φ = 292204368.

The previous prime is 877077647. The next prime is 877077689. The reversal of 877077666 is 666770778.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148135 + ... + 153941.

It is an arithmetic number, because the mean of its divisors is an integer number (60940440).

Almost surely, 2^877077666 is an apocalyptic number.

877077666 is an abundant number, since it is smaller than the sum of its proper divisors (1073016414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

877077666 is a wasteful number, since it uses less digits than its factorization.

877077666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8615 (or 8609 counting only the distinct ones).

The product of its (nonzero) digits is 4148928, while the sum is 54.

The square root of 877077666 is about 29615.4970581282. The cubic root of 877077666 is about 957.2220276703. Note that the first 3 decimals are identical.

It can be divided in two parts, 8770 and 77666, that added together give a square (86436 = 294²).

The spelling of 877077666 in words is "eight hundred seventy-seven million, seventy-seven thousand, six hundred sixty-six".