649870166 has 8 divisors (see below), whose sum is σ = 1063423944. Its totient is φ = 295395520.

The previous prime is 649870159. The next prime is 649870211. The reversal of 649870166 is 661078946.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 649870166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14769755 + ... + 14769798.

It is an arithmetic number, because the mean of its divisors is an integer number (132927993).

Almost surely, 2^649870166 is an apocalyptic number.

649870166 is a deficient number, since it is larger than the sum of its proper divisors (413553778).

649870166 is a wasteful number, since it uses less digits than its factorization.

649870166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29539566.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 649870166 is about 25492.5511865721. The cubic root of 649870166 is about 866.1814259680.

The spelling of 649870166 in words is "six hundred forty-nine million, eight hundred seventy thousand, one hundred sixty-six".