6660620215508 has 24 divisors (see below), whose sum is σ = 13322505975744. Its totient is φ = 2854280332800.

The previous prime is 6660620215387. The next prime is 6660620215511. The reversal of 6660620215508 is 8055120260666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10999373 + ... + 11589108.

It is an arithmetic number, because the mean of its divisors is an integer number (555104415656).

Almost surely, 2^{6660620215508} is an apocalyptic number.

It is an amenable number.

6660620215508 is an abundant number, since it is smaller than the sum of its proper divisors (6661885760236).

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

6660620215508 is a wasteful number, since it uses less digits than its factorization.

6660620215508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22599023 (or 22599021 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 6660620215508 in words is "six trillion, six hundred sixty billion, six hundred twenty million, two hundred fifteen thousand, five hundred eight".