666683650 has 24 divisors (see below), whose sum is σ = 1243808784. Its totient is φ = 265861200.

The previous prime is 666683623. The next prime is 666683783. The reversal of 666683650 is 56386666.

It is a self number, because there is not a number n which added to its sum of digits gives 666683650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3592 + ... + 36691.

It is an arithmetic number, because the mean of its divisors is an integer number (51825366).

Almost surely, 2^666683650 is an apocalyptic number.

666683650 is a deficient number, since it is larger than the sum of its proper divisors (577125134).

666683650 is a wasteful number, since it uses less digits than its factorization.

666683650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40626 (or 40621 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 46.

The square root of 666683650 is about 25820.2178534574. The cubic root of 666683650 is about 873.5878828274.

The spelling of 666683650 in words is "six hundred sixty-six million, six hundred eighty-three thousand, six hundred fifty".