646622774 has 8 divisors (see below), whose sum is σ = 1108496208. Its totient is φ = 277124040.

The previous prime is 646622749. The next prime is 646622789. The reversal of 646622774 is 477226646.

646622774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 23093657 + ... + 23093684.

It is an arithmetic number, because the mean of its divisors is an integer number (138562026).

Almost surely, 2^646622774 is an apocalyptic number.

646622774 is a deficient number, since it is larger than the sum of its proper divisors (461873434).

646622774 is a wasteful number, since it uses less digits than its factorization.

646622774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46187350.

The product of its digits is 677376, while the sum is 44.

The square root of 646622774 is about 25428.7784606339. The cubic root of 646622774 is about 864.7362506824.

The spelling of 646622774 in words is "six hundred forty-six million, six hundred twenty-two thousand, seven hundred seventy-four".