666731401230 has 96 divisors (see below), whose sum is σ = 1700473098240. Its totient is φ = 167272122880.

The previous prime is 666731401229. The next prime is 666731401249. The reversal of 666731401230 is 32104137666.

It is a super-2 number, since 2×666731401230² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24947575 + ... + 24974285.

It is an arithmetic number, because the mean of its divisors is an integer number (17713261440).

Almost surely, 2^666731401230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666731401230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850236549120).

666731401230 is an abundant number, since it is smaller than the sum of its proper divisors (1033741697010).

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

666731401230 is a wasteful number, since it uses less digits than its factorization.

666731401230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29634 (or 29617 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

Adding to 666731401230 its reverse (32104137666), we get a palindrome (698835538896).

The spelling of 666731401230 in words is "six hundred sixty-six billion, seven hundred thirty-one million, four hundred one thousand, two hundred thirty".