666370351542 has 128 divisors (see below), whose sum is σ = 1591423303680. Its totient is φ = 182080114560.

The previous prime is 666370351487. The next prime is 666370351561. The reversal of 666370351542 is 245153073666.

It is a junction number, because it is equal to n+sod(n) for n = 666370351491 and 666370351500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19432692 + ... + 19466952.

It is an arithmetic number, because the mean of its divisors is an integer number (12432994560).

Almost surely, 2^666370351542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666370351542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (795711651840).

666370351542 is an abundant number, since it is smaller than the sum of its proper divisors (925052952138).

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

666370351542 is a wasteful number, since it uses less digits than its factorization.

666370351542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34546.

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 666370351542 in words is "six hundred sixty-six billion, three hundred seventy million, three hundred fifty-one thousand, five hundred forty-two".