66746789315 has 16 divisors (see below), whose sum is σ = 80842066848. Its totient is φ = 52902222336.

The previous prime is 66746789297. The next prime is 66746789327. The reversal of 66746789315 is 51398764766.

66746789315 is digitally balanced in base 11, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 258354²-1.

It is a cyclic number.

It is not a de Polignac number, because 66746789315 - 2⁶ = 66746789251 is a prime.

It is a Duffinian number.

66746789315 is strictly pandigital in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129179 + ... + 387531.

It is an arithmetic number, because the mean of its divisors is an integer number (5052629178).

Almost surely, 2^66746789315 is an apocalyptic number.

66746789315 is a deficient number, since it is larger than the sum of its proper divisors (14095277533).

66746789315 is a wasteful number, since it uses less digits than its factorization.

66746789315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258838.

The product of its digits is 45722880, while the sum is 62.

The spelling of 66746789315 in words is "sixty-six billion, seven hundred forty-six million, seven hundred eighty-nine thousand, three hundred fifteen".