6643530155706 has 32 divisors (see below), whose sum is σ = 13336850685120. Its totient is φ = 2206213842816.

The previous prime is 6643530155699. The next prime is 6643530155707. The reversal of 6643530155706 is 6075510353466.

It is not an unprimeable number, because it can be changed into a prime (6643530155707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12057585 + ... + 12596523.

It is an arithmetic number, because the mean of its divisors is an integer number (416776583910).

Almost surely, 2^{6643530155706} is an apocalyptic number.

6643530155706 is an abundant number, since it is smaller than the sum of its proper divisors (6693320529414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6643530155706 is a wasteful number, since it uses less digits than its factorization.

6643530155706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546638.

The product of its (nonzero) digits is 6804000, while the sum is 51.

The spelling of 6643530155706 in words is "six trillion, six hundred forty-three billion, five hundred thirty million, one hundred fifty-five thousand, seven hundred six".