66312339596536 has 32 divisors (see below), whose sum is σ = 135654651792000. Its totient is φ = 30138466911840.

The previous prime is 66312339596507. The next prime is 66312339596539. The reversal of 66312339596536 is 63569593321366.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66312339596539) 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, 43059390 + ... + 44572813.

It is an arithmetic number, because the mean of its divisors is an integer number (4239207868500).

Almost surely, 2^{66312339596536} is an apocalyptic number.

It is an amenable number.

66312339596536 is an abundant number, since it is smaller than the sum of its proper divisors (69342312195464).

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

66312339596536 is a wasteful number, since it uses less digits than its factorization.

66312339596536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87640819 (or 87640815 counting only the distinct ones).

The product of its digits is 425152800, while the sum is 67.

The spelling of 66312339596536 in words is "sixty-six trillion, three hundred twelve billion, three hundred thirty-nine million, five hundred ninety-six thousand, five hundred thirty-six".