6640124654 has 16 divisors (see below), whose sum is σ = 10003243392. Its totient is φ = 3305729208.

The previous prime is 6640124653. The next prime is 6640124657. The reversal of 6640124654 is 4564210466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640124651) 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, 858167 + ... + 865869.

It is an arithmetic number, because the mean of its divisors is an integer number (625202712).

Almost surely, 2^6640124654 is an apocalyptic number.

6640124654 is a deficient number, since it is larger than the sum of its proper divisors (3363118738).

6640124654 is a wasteful number, since it uses less digits than its factorization.

6640124654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6640124654 is about 81486.9600242885. The cubic root of 6640124654 is about 1879.5710366932.

The spelling of 6640124654 in words is "six billion, six hundred forty million, one hundred twenty-four thousand, six hundred fifty-four".