6660542100 has 36 divisors (see below), whose sum is σ = 19271169344. Its totient is φ = 1776144480.

The previous prime is 6660542089. The next prime is 6660542111. The reversal of 6660542100 is 12450666.

It is an interprime number because it is at equal distance from previous prime (6660542089) and next prime (6660542111).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11100604 + ... + 11101203.

Almost surely, 2^6660542100 is an apocalyptic number.

6660542100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6660542100 is an abundant number, since it is smaller than the sum of its proper divisors (12610627244).

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

6660542100 is a wasteful number, since it uses less digits than its factorization.

6660542100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22201824 (or 22201817 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6660542100 is about 81612.1443168846. The cubic root of 6660542100 is about 1881.4955373897.

Adding to 6660542100 its reverse (12450666), we get a palindrome (6672992766).

The spelling of 6660542100 in words is "six billion, six hundred sixty million, five hundred forty-two thousand, one hundred".