666665064845626 has 32 divisors (see below), whose sum is σ = 1259603346540672. Its totient is φ = 257061907445760.

The previous prime is 666665064845623. The next prime is 666665064845669. The reversal of 666665064845626 is 626548460566666.

It is a super-2 number, since 2×666665064845626² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666665064845623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22314386751 + ... + 22314416626.

It is an arithmetic number, because the mean of its divisors is an integer number (39362604579396).

Almost surely, 2^{666665064845626} is an apocalyptic number.

666665064845626 is a deficient number, since it is larger than the sum of its proper divisors (592938281695046).

666665064845626 is a wasteful number, since it uses less digits than its factorization.

666665064845626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44628803494.

The product of its (nonzero) digits is 10749542400, while the sum is 76.

The spelling of 666665064845626 in words is "six hundred sixty-six trillion, six hundred sixty-five billion, sixty-four million, eight hundred forty-five thousand, six hundred twenty-six".