166666494 has 8 divisors (see below), whose sum is σ = 333333000. Its totient is φ = 55555496.

The previous prime is 166666481. The next prime is 166666547. The reversal of 166666494 is 494666661.

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

166666494 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13888869 + ... + 13888880.

It is an arithmetic number, because the mean of its divisors is an integer number (41666625).

Almost surely, 2^166666494 is an apocalyptic number.

166666494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166666494 is a wasteful number, since it uses less digits than its factorization.

166666494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27777754.

The product of its digits is 1119744, while the sum is 48.

The square root of 166666494 is about 12909.9378000051. The cubic root of 166666494 is about 550.3210181048.

The spelling of 166666494 in words is "one hundred sixty-six million, six hundred sixty-six thousand, four hundred ninety-four".