166444436 has 12 divisors (see below), whose sum is σ = 291410112. Its totient is φ = 83184408.

The previous prime is 166444429. The next prime is 166444457. The reversal of 166444436 is 634444661.

It is a self number, because there is not a number n which added to its sum of digits gives 166444436.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1991 + ... + 18353.

It is an arithmetic number, because the mean of its divisors is an integer number (24284176).

Almost surely, 2^166444436 is an apocalyptic number.

It is an amenable number.

166444436 is a deficient number, since it is larger than the sum of its proper divisors (124965676).

166444436 is a wasteful number, since it uses less digits than its factorization.

166444436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18910 (or 18908 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 166444436 is about 12901.3346596389. The cubic root of 166444436 is about 550.0765028569.

The spelling of 166444436 in words is "one hundred sixty-six million, four hundred forty-four thousand, four hundred thirty-six".