66877860 has 48 divisors (see below), whose sum is σ = 214010496. Its totient is φ = 15286272.

The previous prime is 66877849. The next prime is 66877897. The reversal of 66877860 is 6877866.

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, 79197 + ... + 80036.

It is an arithmetic number, because the mean of its divisors is an integer number (4458552).

Almost surely, 2^66877860 is an apocalyptic number.

66877860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66877860 is an abundant number, since it is smaller than the sum of its proper divisors (147132636).

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

66877860 is a wasteful number, since it uses less digits than its factorization.

66877860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159252 (or 159250 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 66877860 is about 8177.8884805309. Note that the first 3 decimals coincide. The cubic root of 66877860 is about 405.9078551998.

The spelling of 66877860 in words is "sixty-six million, eight hundred seventy-seven thousand, eight hundred sixty".