66433621430 has 32 divisors (see below), whose sum is σ = 133633227168. Its totient is φ = 23568467200.

The previous prime is 66433621417. The next prime is 66433621433. The reversal of 66433621430 is 3412633466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66433621433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7360637 + ... + 7369656.

It is an arithmetic number, because the mean of its divisors is an integer number (4176038349).

Almost surely, 2^66433621430 is an apocalyptic number.

66433621430 is an abundant number, since it is smaller than the sum of its proper divisors (67199605738).

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

66433621430 is a wasteful number, since it uses less digits than its factorization.

66433621430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14730352.

The product of its (nonzero) digits is 186624, while the sum is 38.

The spelling of 66433621430 in words is "sixty-six billion, four hundred thirty-three million, six hundred twenty-one thousand, four hundred thirty".