66740794575 has 192 divisors, whose sum is σ = 139053100032. Its totient is φ = 27495936000.

The previous prime is 66740794573. The next prime is 66740794591. The reversal of 66740794575 is 57549704766.

It is not a de Polignac number, because 66740794575 - 2¹ = 66740794573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740794573) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 111049275 + ... + 111049875.

It is an arithmetic number, because the mean of its divisors is an integer number (724234896).

Almost surely, 2^66740794575 is an apocalyptic number.

66740794575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66740794575 is an abundant number, since it is smaller than the sum of its proper divisors (72312305457).

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

66740794575 is a wasteful number, since it uses less digits than its factorization.

66740794575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 44452800, while the sum is 60.

The spelling of 66740794575 in words is "sixty-six billion, seven hundred forty million, seven hundred ninety-four thousand, five hundred seventy-five".