640104166 has 8 divisors (see below), whose sum is σ = 1034014464. Its totient is φ = 295432680.

The previous prime is 640104137. The next prime is 640104187. The reversal of 640104166 is 661401046.

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

It is a congruent number.

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, 12309670 + ... + 12309721.

It is an arithmetic number, because the mean of its divisors is an integer number (129251808).

Almost surely, 2^640104166 is an apocalyptic number.

640104166 is a deficient number, since it is larger than the sum of its proper divisors (393910298).

640104166 is a wasteful number, since it uses less digits than its factorization.

640104166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24619406.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 640104166 is about 25300.2799589254. The cubic root of 640104166 is about 861.8206274023.

The spelling of 640104166 in words is "six hundred forty million, one hundred four thousand, one hundred sixty-six".