66975929797392 has 800 divisors, whose sum is σ = 249629286703104. Its totient is φ = 16824862771200.

The previous prime is 66975929797379. The next prime is 66975929797421. The reversal of 66975929797392 is 29379792957966.

66975929797392 is a `hidden beast` number, since 6 + 6 + 9 + 7 + 592 + 9 + 7 + 9 + 7 + 3 + 9 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5899397988 + ... + 5899409340.

Almost surely, 2^{66975929797392} is an apocalyptic number.

66975929797392 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66975929797392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124814643351552).

66975929797392 is an abundant number, since it is smaller than the sum of its proper divisors (182653356905712).

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

66975929797392 is a wasteful number, since it uses less digits than its factorization.

66975929797392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13329 (or 13314 counting only the distinct ones).

The product of its digits is 43748223120, while the sum is 90.

The spelling of 66975929797392 in words is "sixty-six trillion, nine hundred seventy-five billion, nine hundred twenty-nine million, seven hundred ninety-seven thousand, three hundred ninety-two".