166246979 has 4 divisors (see below), whose sum is σ = 174996840. Its totient is φ = 157497120.

The previous prime is 166246939. The next prime is 166247023. The reversal of 166246979 is 979642661.

166246979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979642661 = 13337 ⋅73453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166246979 is a prime.

It is a super-3 number, since 3×166246979³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166246939) 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, 4374902 + ... + 4374939.

It is an arithmetic number, because the mean of its divisors is an integer number (43749210).

Almost surely, 2^166246979 is an apocalyptic number.

166246979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

166246979 is a deficient number, since it is larger than the sum of its proper divisors (8749861).

166246979 is an equidigital number, since it uses as much as digits as its factorization.

166246979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749860.

The product of its digits is 979776, while the sum is 50.

The square root of 166246979 is about 12893.6798083402. The cubic root of 166246979 is about 549.8588938289.

The spelling of 166246979 in words is "one hundred sixty-six million, two hundred forty-six thousand, nine hundred seventy-nine".