66432325631 has 8 divisors (see below), whose sum is σ = 76594540704. Its totient is φ = 56438081280.

The previous prime is 66432325627. The next prime is 66432325649. The reversal of 66432325631 is 13652323466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66432325631 - 2² = 66432325627 is a prime.

It is a super-2 number, since 2×66432325631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66432325601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41991830 + ... + 41993411.

It is an arithmetic number, because the mean of its divisors is an integer number (9574317588).

Almost surely, 2^66432325631 is an apocalyptic number.

66432325631 is a deficient number, since it is larger than the sum of its proper divisors (10162215073).

66432325631 is a wasteful number, since it uses less digits than its factorization.

66432325631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83985361.

The product of its digits is 466560, while the sum is 41.

The spelling of 66432325631 in words is "sixty-six billion, four hundred thirty-two million, three hundred twenty-five thousand, six hundred thirty-one".