166665494 has 32 divisors (see below), whose sum is σ = 265356000. Its totient is φ = 78394624.

The previous prime is 166665493. The next prime is 166665503. The reversal of 166665494 is 494566661.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166665493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428252 + ... + 428640.

It is an arithmetic number, because the mean of its divisors is an integer number (8292375).

Almost surely, 2^166665494 is an apocalyptic number.

166665494 is a deficient number, since it is larger than the sum of its proper divisors (98690506).

166665494 is a wasteful number, since it uses less digits than its factorization.

166665494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its digits is 933120, while the sum is 47.

The square root of 166665494 is about 12909.8990700935. The cubic root of 166665494 is about 550.3199174594.

The spelling of 166665494 in words is "one hundred sixty-six million, six hundred sixty-five thousand, four hundred ninety-four".