166403315 has 12 divisors (see below), whose sum is σ = 216226944. Its totient is φ = 122881824.

The previous prime is 166403287. The next prime is 166403317. The reversal of 166403315 is 513304661.

It is a happy number.

It is not a de Polignac number, because 166403315 - 2²² = 162209011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166403317) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 97619 + ... + 99308.

It is an arithmetic number, because the mean of its divisors is an integer number (18018912).

Almost surely, 2^166403315 is an apocalyptic number.

166403315 is a deficient number, since it is larger than the sum of its proper divisors (49823629).

166403315 is a wasteful number, since it uses less digits than its factorization.

166403315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196958 (or 196945 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 166403315 is about 12899.7408888706. The cubic root of 166403315 is about 550.0311993321.

Adding to 166403315 its reverse (513304661), we get a palindrome (679707976).

The spelling of 166403315 in words is "one hundred sixty-six million, four hundred three thousand, three hundred fifteen".