6840624664 has 16 divisors (see below), whose sum is σ = 13139005320. Its totient is φ = 3336889920.

The previous prime is 6840624631. The next prime is 6840624667. The reversal of 6840624664 is 4664260486.

It is a super-2 number, since 2×6840624664² = 93588291587450225792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840624667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10427454 + ... + 10428109.

Almost surely, 2^6840624664 is an apocalyptic number.

It is an amenable number.

6840624664 is a deficient number, since it is larger than the sum of its proper divisors (6298380656).

6840624664 is a wasteful number, since it uses less digits than its factorization.

6840624664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20855610 (or 20855606 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 46.

The square root of 6840624664 is about 82708.0689171256. The cubic root of 6840624664 is about 1898.3017756502.

The spelling of 6840624664 in words is "six billion, eight hundred forty million, six hundred twenty-four thousand, six hundred sixty-four".