166623742 has 8 divisors (see below), whose sum is σ = 255253536. Its totient is φ = 81539232.

The previous prime is 166623733. The next prime is 166623781. The reversal of 166623742 is 247326661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886203 + ... + 886390.

It is an arithmetic number, because the mean of its divisors is an integer number (31906692).

Almost surely, 2^166623742 is an apocalyptic number.

166623742 is a deficient number, since it is larger than the sum of its proper divisors (88629794).

166623742 is a wasteful number, since it uses less digits than its factorization.

166623742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772642.

The product of its digits is 72576, while the sum is 37.

The square root of 166623742 is about 12908.2819151117. The cubic root of 166623742 is about 550.2739593838.

The spelling of 166623742 in words is "one hundred sixty-six million, six hundred twenty-three thousand, seven hundred forty-two".