666743094 has 48 divisors (see below), whose sum is σ = 1549005120. Its totient is φ = 206519040.

The previous prime is 666743087. The next prime is 666743123. The reversal of 666743094 is 490347666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10384 + ... + 37964.

It is an arithmetic number, because the mean of its divisors is an integer number (32270940).

Almost surely, 2^666743094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666743094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774502560).

666743094 is an abundant number, since it is smaller than the sum of its proper divisors (882262026).

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

666743094 is a wasteful number, since it uses less digits than its factorization.

666743094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27685 (or 27682 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The square root of 666743094 is about 25821.3689412471. The cubic root of 666743094 is about 873.6138461734.

The spelling of 666743094 in words is "six hundred sixty-six million, seven hundred forty-three thousand, ninety-four".