646625222 has 8 divisors (see below), whose sum is σ = 970326000. Its totient is φ = 323183224.

The previous prime is 646625219. The next prime is 646625237. The reversal of 646625222 is 222526646.

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, 58322 + ... + 68517.

It is an arithmetic number, because the mean of its divisors is an integer number (121290750).

Almost surely, 2^646625222 is an apocalyptic number.

646625222 is a deficient number, since it is larger than the sum of its proper divisors (323700778).

646625222 is a wasteful number, since it uses less digits than its factorization.

646625222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129390.

The product of its digits is 69120, while the sum is 35.

The square root of 646625222 is about 25428.8265950279. The cubic root of 646625222 is about 864.7373419274.

The spelling of 646625222 in words is "six hundred forty-six million, six hundred twenty-five thousand, two hundred twenty-two".