666308742330 has 256 divisors, whose sum is σ = 2003905806336. Its totient is φ = 137749566720.

The previous prime is 666308742313. The next prime is 666308742331. The reversal of 666308742330 is 33247803666.

It is a self number, because there is not a number n which added to its sum of digits gives 666308742330.

It is not an unprimeable number, because it can be changed into a prime (666308742331) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 519335869 + ... + 519337151.

It is an arithmetic number, because the mean of its divisors is an integer number (7827757056).

Almost surely, 2^666308742330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666308742330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001952903168).

666308742330 is an abundant number, since it is smaller than the sum of its proper divisors (1337597064006).

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

666308742330 is a wasteful number, since it uses less digits than its factorization.

666308742330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281.

The product of its (nonzero) digits is 2612736, while the sum is 48.

The spelling of 666308742330 in words is "six hundred sixty-six billion, three hundred eight million, seven hundred forty-two thousand, three hundred thirty".