66432102100 has 72 divisors (see below), whose sum is σ = 177424838528. Its totient is φ = 21024662400.

The previous prime is 66432102059. The next prime is 66432102157. The reversal of 66432102100 is 120123466.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 23 ways as a sum of consecutive naturals, for example, 3641016 + ... + 3659215.

Almost surely, 2^66432102100 is an apocalyptic number.

It is an amenable number.

66432102100 is an abundant number, since it is smaller than the sum of its proper divisors (110992736428).

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

66432102100 is a wasteful number, since it uses less digits than its factorization.

66432102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300265 (or 7300258 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 66432102100 its reverse (120123466), we get a palindrome (66552225566).

The spelling of 66432102100 in words is "sixty-six billion, four hundred thirty-two million, one hundred two thousand, one hundred".