646975033 has 8 divisors (see below), whose sum is σ = 668452928. Its totient is φ = 625789584.

The previous prime is 646974997. The next prime is 646975037. The reversal of 646975033 is 330579646.

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

It is a cyclic number.

It is not a de Polignac number, because 646975033 - 2²⁵ = 613420601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646975037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68610 + ... + 77467.

It is an arithmetic number, because the mean of its divisors is an integer number (83556616).

Almost surely, 2^646975033 is an apocalyptic number.

It is an amenable number.

646975033 is a deficient number, since it is larger than the sum of its proper divisors (21477895).

646975033 is a wasteful number, since it uses less digits than its factorization.

646975033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146223.

The product of its (nonzero) digits is 408240, while the sum is 43.

The square root of 646975033 is about 25435.7039021923. The cubic root of 646975033 is about 864.8932488797.

The spelling of 646975033 in words is "six hundred forty-six million, nine hundred seventy-five thousand, thirty-three".