166212015 has 16 divisors (see below), whose sum is σ = 266460288. Its totient is φ = 88472736.

The previous prime is 166211993. The next prime is 166212031. The reversal of 166212015 is 510212661.

It is not a de Polignac number, because 166212015 - 2⁶ = 166211951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2749 + ... + 18438.

It is an arithmetic number, because the mean of its divisors is an integer number (16653768).

Almost surely, 2^166212015 is an apocalyptic number.

166212015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166212015 is a deficient number, since it is larger than the sum of its proper divisors (100248273).

166212015 is a wasteful number, since it uses less digits than its factorization.

166212015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21718.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 166212015 is about 12892.3238789599. The cubic root of 166212015 is about 549.8203435258.

Adding to 166212015 its reverse (510212661), we get a palindrome (676424676).

The spelling of 166212015 in words is "one hundred sixty-six million, two hundred twelve thousand, fifteen".