6651155506620 has 24 divisors (see below), whose sum is σ = 18623235418704. Its totient is φ = 1773641468416.

The previous prime is 6651155506573. The next prime is 6651155506627. The reversal of 6651155506620 is 266055511566.

It is a self number, because there is not a number n which added to its sum of digits gives 6651155506620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651155506627) 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, 55426295829 + ... + 55426295948.

It is an arithmetic number, because the mean of its divisors is an integer number (775968142446).

Almost surely, 2^{6651155506620} is an apocalyptic number.

6651155506620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6651155506620 is an abundant number, since it is smaller than the sum of its proper divisors (11972079912084).

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

6651155506620 is a wasteful number, since it uses less digits than its factorization.

6651155506620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110852591789 (or 110852591787 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 6651155506620 in words is "six trillion, six hundred fifty-one billion, one hundred fifty-five million, five hundred six thousand, six hundred twenty".