66469251723 has 32 divisors (see below), whose sum is σ = 102632165376. Its totient is φ = 37480412448.

The previous prime is 66469251713. The next prime is 66469251763. The reversal of 66469251723 is 32715296466.

It is not a de Polignac number, because 66469251723 - 2⁵ = 66469251691 is a prime.

It is a super-2 number, since 2×66469251723² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66469251713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557836 + ... + 666422.

It is an arithmetic number, because the mean of its divisors is an integer number (3207255168).

Almost surely, 2^66469251723 is an apocalyptic number.

66469251723 is a deficient number, since it is larger than the sum of its proper divisors (36162913653).

66469251723 is a wasteful number, since it uses less digits than its factorization.

66469251723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108983.

The product of its digits is 3265920, while the sum is 51.

The spelling of 66469251723 in words is "sixty-six billion, four hundred sixty-nine million, two hundred fifty-one thousand, seven hundred twenty-three".