646774003 has 24 divisors (see below), whose sum is σ = 712143360. Its totient is φ = 585396000.

The previous prime is 646773991. The next prime is 646774021. The reversal of 646774003 is 300477646.

It is not a de Polignac number, because 646774003 - 2²⁵ = 613219571 is a prime.

It is a super-2 number, since 2×646774003² = 836633221913288018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646774603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6403653 + ... + 6403753.

It is an arithmetic number, because the mean of its divisors is an integer number (29672640).

Almost surely, 2^646774003 is an apocalyptic number.

646774003 is a deficient number, since it is larger than the sum of its proper divisors (65369357).

646774003 is a wasteful number, since it uses less digits than its factorization.

646774003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 646774003 is about 25431.7518665152. The cubic root of 646774003 is about 864.8036588685.

The spelling of 646774003 in words is "six hundred forty-six million, seven hundred seventy-four thousand, three".