166124997 has 24 divisors (see below), whose sum is σ = 244384920. Its totient is φ = 108725760.

The previous prime is 166124993. The next prime is 166125007. The reversal of 166124997 is 799421661.

It can be written as a sum of positive squares in 4 ways, for example, as 22268961 + 143856036 = 4719^2 + 11994^2 .

It is not a de Polignac number, because 166124997 - 2² = 166124993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166124993) 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 23 ways as a sum of consecutive naturals, for example, 125097 + ... + 126417.

It is an arithmetic number, because the mean of its divisors is an integer number (10182705).

Almost surely, 2^166124997 is an apocalyptic number.

It is an amenable number.

166124997 is a deficient number, since it is larger than the sum of its proper divisors (78259923).

166124997 is a wasteful number, since it uses less digits than its factorization.

166124997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573 (or 1570 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 166124997 is about 12888.9486382715. The cubic root of 166124997 is about 549.7243764994.

It can be divided in two parts, 16612 and 4997, that added together give a square (21609 = 147²).

The spelling of 166124997 in words is "one hundred sixty-six million, one hundred twenty-four thousand, nine hundred ninety-seven".