66572267663 has 16 divisors (see below), whose sum is σ = 73578052512. Its totient is φ = 59729280000.

The previous prime is 66572267633. The next prime is 66572267693. The reversal of 66572267663 is 36676227566.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66572267633) and next prime (66572267693).

It is a cyclic number.

It is not a de Polignac number, because 66572267663 - 2⁶ = 66572267599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66572267599 and 66572267608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572267633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252023 + ... + 443463.

It is an arithmetic number, because the mean of its divisors is an integer number (4598628282).

Almost surely, 2^66572267663 is an apocalyptic number.

66572267663 is a deficient number, since it is larger than the sum of its proper divisors (7005784849).

66572267663 is a wasteful number, since it uses less digits than its factorization.

66572267663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191866.

The product of its digits is 22861440, while the sum is 56.

The spelling of 66572267663 in words is "sixty-six billion, five hundred seventy-two million, two hundred sixty-seven thousand, six hundred sixty-three".