666037054415502 has 320 divisors, whose sum is σ = 1945434265657344. Its totient is φ = 165146032560960.

The previous prime is 666037054415449. The next prime is 666037054415503. The reversal of 666037054415502 is 205514450730666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666037054415503) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 142004073 + ... + 146619339.

Almost surely, 2^{666037054415502} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666037054415502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (972717132828672).

666037054415502 is an abundant number, since it is smaller than the sum of its proper divisors (1279397211241842).

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

666037054415502 is a wasteful number, since it uses less digits than its factorization.

666037054415502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615825 (or 4615816 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 54.

The spelling of 666037054415502 in words is "six hundred sixty-six trillion, thirty-seven billion, fifty-four million, four hundred fifteen thousand, five hundred two".