6456428668 has 12 divisors (see below), whose sum is σ = 11352300232. Its totient is φ = 3212914320.

The previous prime is 6456428639. The next prime is 6456428687. The reversal of 6456428668 is 8668246546.

It is a super-2 number, since 2×6456428668² = 83370942289944508448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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, 3824055 + ... + 3825742.

Almost surely, 2^6456428668 is an apocalyptic number.

It is an amenable number.

6456428668 is a deficient number, since it is larger than the sum of its proper divisors (4895871564).

6456428668 is a wasteful number, since it uses less digits than its factorization.

6456428668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650012 (or 7650010 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 55.

The square root of 6456428668 is about 80351.9051920986. The cubic root of 6456428668 is about 1862.0762135846.

The spelling of 6456428668 in words is "six billion, four hundred fifty-six million, four hundred twenty-eight thousand, six hundred sixty-eight".