66666252100 has 72 divisors (see below), whose sum is σ = 172520707968. Its totient is φ = 21863212800.

The previous prime is 66666252073. The next prime is 66666252101. The reversal of 66666252100 is 125266666.

66666252100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66666252101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2054281 + ... + 2086480.

It is an arithmetic number, because the mean of its divisors is an integer number (2396120944).

Almost surely, 2^66666252100 is an apocalyptic number.

It is an amenable number.

66666252100 is an abundant number, since it is smaller than the sum of its proper divisors (105854455868).

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

66666252100 is a wasteful number, since it uses less digits than its factorization.

66666252100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140805 (or 4140798 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 66666252100 in words is "sixty-six billion, six hundred sixty-six million, two hundred fifty-two thousand, one hundred".