166429994 has 8 divisors (see below), whose sum is σ = 250108068. Its totient is φ = 83060640.

The previous prime is 166429993. The next prime is 166430003. The reversal of 166429994 is 499924661.

166429994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 155625625 + 10804369 = 12475^2 + 3287^2 .

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

It is not an unprimeable number, because it can be changed into a prime (166429993) 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, 75827 + ... + 77990.

Almost surely, 2^166429994 is an apocalyptic number.

166429994 is a deficient number, since it is larger than the sum of its proper divisors (83678074).

166429994 is a wasteful number, since it uses less digits than its factorization.

166429994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154360.

The product of its digits is 839808, while the sum is 50.

The square root of 166429994 is about 12900.7749379640. The cubic root of 166429994 is about 550.0605927734.

The spelling of 166429994 in words is "one hundred sixty-six million, four hundred twenty-nine thousand, nine hundred ninety-four".