166986224 has 20 divisors (see below), whose sum is σ = 326009640. Its totient is φ = 82854720.

The previous prime is 166986221. The next prime is 166986227. The reversal of 166986224 is 422689661.

It is an interprime number because it is at equal distance from previous prime (166986221) and next prime (166986227).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166986221) 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, 37739 + ... + 41930.

It is an arithmetic number, because the mean of its divisors is an integer number (16300482).

Almost surely, 2^166986224 is an apocalyptic number.

It is an amenable number.

166986224 is a deficient number, since it is larger than the sum of its proper divisors (159023416).

166986224 is a wasteful number, since it uses less digits than its factorization.

166986224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79808 (or 79802 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 166986224 is about 12922.3149628849. The cubic root of 166986224 is about 550.6727019554.

It can be divided in two parts, 16698 and 6224, that added together give a palindrome (22922).

The spelling of 166986224 in words is "one hundred sixty-six million, nine hundred eighty-six thousand, two hundred twenty-four".