166435994 has 8 divisors (see below), whose sum is σ = 249848928. Its totient is φ = 83153020.

The previous prime is 166435943. The next prime is 166436003. The reversal of 166435994 is 499534661.

It is a happy number.

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

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, 29222 + ... + 34449.

It is an arithmetic number, because the mean of its divisors is an integer number (31231116).

Almost surely, 2^166435994 is an apocalyptic number.

166435994 is a deficient number, since it is larger than the sum of its proper divisors (83412934).

166435994 is a wasteful number, since it uses less digits than its factorization.

166435994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64980.

The product of its digits is 699840, while the sum is 47.

The square root of 166435994 is about 12901.0074800381. The cubic root of 166435994 is about 550.0672028076.

The spelling of 166435994 in words is "one hundred sixty-six million, four hundred thirty-five thousand, nine hundred ninety-four".