66751233022523 has 4 divisors (see below), whose sum is σ = 76287123454320. Its totient is φ = 57215342590728.

The previous prime is 66751233022517. The next prime is 66751233022601. The reversal of 66751233022523 is 32522033215766.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66751233022523 - 2⁸ = 66751233022267 is a prime.

It is a super-2 number, since 2×66751233022523² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66751233022723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4767945215888 + ... + 4767945215901.

It is an arithmetic number, because the mean of its divisors is an integer number (19071780863580).

Almost surely, 2^{66751233022523} is an apocalyptic number.

66751233022523 is a deficient number, since it is larger than the sum of its proper divisors (9535890431797).

66751233022523 is an equidigital number, since it uses as much as digits as its factorization.

66751233022523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535890431796.

The product of its (nonzero) digits is 2721600, while the sum is 47.

The spelling of 66751233022523 in words is "sixty-six trillion, seven hundred fifty-one billion, two hundred thirty-three million, twenty-two thousand, five hundred twenty-three".