166661294 has 8 divisors (see below), whose sum is σ = 253723368. Its totient is φ = 82086840.

The previous prime is 166661291. The next prime is 166661303. The reversal of 166661294 is 492166661.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166661291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621737 + ... + 622004.

It is an arithmetic number, because the mean of its divisors is an integer number (31715421).

Almost surely, 2^166661294 is an apocalyptic number.

166661294 is a deficient number, since it is larger than the sum of its proper divisors (87062074).

166661294 is a wasteful number, since it uses less digits than its factorization.

166661294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243810.

The product of its digits is 93312, while the sum is 41.

The square root of 166661294 is about 12909.7364031958. The cubic root of 166661294 is about 550.3152947007.

The spelling of 166661294 in words is "one hundred sixty-six million, six hundred sixty-one thousand, two hundred ninety-four".