66774231423 has 12 divisors (see below), whose sum is σ = 96454157800. Its totient is φ = 44515004976.

The previous prime is 66774231383. The next prime is 66774231437. The reversal of 66774231423 is 32413247766.

It is not a de Polignac number, because 66774231423 - 2⁹ = 66774230911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66774631423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416265 + ... + 553917.

Almost surely, 2^66774231423 is an apocalyptic number.

66774231423 is a deficient number, since it is larger than the sum of its proper divisors (29679926377).

66774231423 is a wasteful number, since it uses less digits than its factorization.

66774231423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191558 (or 191555 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 45.

The spelling of 66774231423 in words is "sixty-six billion, seven hundred seventy-four million, two hundred thirty-one thousand, four hundred twenty-three".