387808666 has 8 divisors (see below), whose sum is σ = 664814880. Its totient is φ = 166203708.

The previous prime is 387808657. The next prime is 387808679. The reversal of 387808666 is 666808783.

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

It is a super-2 number, since 2×387808666² = 300791122849399112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13850296 + ... + 13850323.

It is an arithmetic number, because the mean of its divisors is an integer number (83101860).

Almost surely, 2^387808666 is an apocalyptic number.

387808666 is a deficient number, since it is larger than the sum of its proper divisors (277006214).

387808666 is a wasteful number, since it uses less digits than its factorization.

387808666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27700628.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 387808666 is about 19692.8582486139. The cubic root of 387808666 is about 729.2433932316.

The spelling of 387808666 in words is "three hundred eighty-seven million, eight hundred eight thousand, six hundred sixty-six".