666235413037044 has 72 divisors (see below), whose sum is σ = 1686063006858048. Its totient is φ = 221819011090560.

The previous prime is 666235413037043. The next prime is 666235413037069. The reversal of 666235413037044 is 440730314532666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666235413037043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333998089 + ... + 335986895.

Almost surely, 2^{666235413037044} is an apocalyptic number.

It is an amenable number.

666235413037044 is an abundant number, since it is smaller than the sum of its proper divisors (1019827593821004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666235413037044 is a wasteful number, since it uses less digits than its factorization.

666235413037044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999685 (or 1999680 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 54.

The spelling of 666235413037044 in words is "six hundred sixty-six trillion, two hundred thirty-five billion, four hundred thirteen million, thirty-seven thousand, forty-four".