6656620806254 has 8 divisors (see below), whose sum is σ = 9985585190040. Its totient is φ = 3328092409576.

The previous prime is 6656620806223. The next prime is 6656620806257. The reversal of 6656620806254 is 4526080266566.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6656620806254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656620806257) 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, 108958604 + ... + 109019679.

It is an arithmetic number, because the mean of its divisors is an integer number (1248198148755).

Almost surely, 2^{6656620806254} is an apocalyptic number.

6656620806254 is a deficient number, since it is larger than the sum of its proper divisors (3328964383786).

6656620806254 is a wasteful number, since it uses less digits than its factorization.

6656620806254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217993554.

The product of its (nonzero) digits is 24883200, while the sum is 56.

The spelling of 6656620806254 in words is "six trillion, six hundred fifty-six billion, six hundred twenty million, eight hundred six thousand, two hundred fifty-four".