66166212632 has 32 divisors (see below), whose sum is σ = 133694653680. Its totient is φ = 30517726080.

The previous prime is 66166212613. The next prime is 66166212701. The reversal of 66166212632 is 23621266166.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66166212632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57794 + ... + 368337.

Almost surely, 2^66166212632 is an apocalyptic number.

It is an amenable number.

66166212632 is an abundant number, since it is smaller than the sum of its proper divisors (67528441048).

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

66166212632 is a wasteful number, since it uses less digits than its factorization.

66166212632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427643 (or 427639 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

Adding to 66166212632 its reverse (23621266166), we get a palindrome (89787478798).

The spelling of 66166212632 in words is "sixty-six billion, one hundred sixty-six million, two hundred twelve thousand, six hundred thirty-two".