64668190 has 8 divisors (see below), whose sum is σ = 116402760. Its totient is φ = 25867272.

The previous prime is 64668181. The next prime is 64668209. The reversal of 64668190 is 9186646.

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

It is a super-2 number, since 2×64668190² = 8363949595752200, which contains 22 as substring.

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, 3233400 + ... + 3233419.

It is an arithmetic number, because the mean of its divisors is an integer number (14550345).

Almost surely, 2^64668190 is an apocalyptic number.

64668190 is a deficient number, since it is larger than the sum of its proper divisors (51734570).

64668190 is a wasteful number, since it uses less digits than its factorization.

64668190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466826.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 64668190 is about 8041.6534369494. The cubic root of 64668190 is about 401.3872458108.

The spelling of 64668190 in words is "sixty-four million, six hundred sixty-eight thousand, one hundred ninety".