666737373400 has 96 divisors (see below), whose sum is σ = 1772846173440. Its totient is φ = 228436997760.

The previous prime is 666737373359. The next prime is 666737373409. The reversal of 666737373400 is 4373737666.

666737373400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666737373409) 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, 1861239 + ... + 2190361.

It is an arithmetic number, because the mean of its divisors is an integer number (18467147640).

Almost surely, 2^666737373400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666737373400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886423086720).

666737373400 is an abundant number, since it is smaller than the sum of its proper divisors (1106108800040).

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

666737373400 is a wasteful number, since it uses less digits than its factorization.

666737373400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330593 (or 330584 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 52.

The spelling of 666737373400 in words is "six hundred sixty-six billion, seven hundred thirty-seven million, three hundred seventy-three thousand, four hundred".