166815130 has 8 divisors (see below), whose sum is σ = 300267252. Its totient is φ = 66726048.

The previous prime is 166815119. The next prime is 166815137. The reversal of 166815130 is 31518661.

It can be written as a sum of positive squares in 2 ways, for example, as 165817129 + 998001 = 12877^2 + 999^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 166815092 and 166815101.

It is not an unprimeable number, because it can be changed into a prime (166815137) 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, 8340747 + ... + 8340766.

Almost surely, 2^166815130 is an apocalyptic number.

166815130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166815130 is a deficient number, since it is larger than the sum of its proper divisors (133452122).

166815130 is a wasteful number, since it uses less digits than its factorization.

166815130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681520.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 166815130 is about 12915.6931676159. The cubic root of 166815130 is about 550.4845646957.

The spelling of 166815130 in words is "one hundred sixty-six million, eight hundred fifteen thousand, one hundred thirty".