166026618 has 16 divisors (see below), whose sum is σ = 368948160. Its totient is φ = 55342188.

The previous prime is 166026611. The next prime is 166026631. The reversal of 166026618 is 816620661.

166026618 is a `hidden beast` number, since 16 + 6 + 0 + 26 + 618 = 666.

It is not an unprimeable number, because it can be changed into a prime (166026611) 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 7 ways as a sum of consecutive naturals, for example, 1537230 + ... + 1537337.

It is an arithmetic number, because the mean of its divisors is an integer number (23059260).

Almost surely, 2^166026618 is an apocalyptic number.

166026618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166026618 is an abundant number, since it is smaller than the sum of its proper divisors (202921542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166026618 is a wasteful number, since it uses less digits than its factorization.

166026618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074578 (or 3074572 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 166026618 is about 12885.1316640537. The cubic root of 166026618 is about 549.6158397258.

It can be divided in two parts, 16602 and 6618, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 166026618 in words is "one hundred sixty-six million, twenty-six thousand, six hundred eighteen".