666877960 has 64 divisors (see below), whose sum is σ = 1805097600. Its totient is φ = 216608256.

The previous prime is 666877957. The next prime is 666877961. The reversal of 666877960 is 69778666.

It is not an unprimeable number, because it can be changed into a prime (666877961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57357 + ... + 67996.

It is an arithmetic number, because the mean of its divisors is an integer number (28204650).

Almost surely, 2^666877960 is an apocalyptic number.

It is an amenable number.

666877960 is an abundant number, since it is smaller than the sum of its proper divisors (1138219640).

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

666877960 is a wasteful number, since it uses less digits than its factorization.

666877960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125390 (or 125386 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The square root of 666877960 is about 25823.9803283692. The cubic root of 666877960 is about 873.6727458520.

It can be divided in two parts, 66687 and 7960, that added together give a palindrome (74647).

The spelling of 666877960 in words is "six hundred sixty-six million, eight hundred seventy-seven thousand, nine hundred sixty".