166764542 has 32 divisors (see below), whose sum is σ = 293088000. Its totient is φ = 71135064.

The previous prime is 166764527. The next prime is 166764557. The reversal of 166764542 is 245467661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (166764527) and next prime (166764557).

It is a self number, because there is not a number n which added to its sum of digits gives 166764542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193709 + ... + 194567.

It is an arithmetic number, because the mean of its divisors is an integer number (9159000).

Almost surely, 2^166764542 is an apocalyptic number.

166764542 is a deficient number, since it is larger than the sum of its proper divisors (126323458).

166764542 is an equidigital number, since it uses as much as digits as its factorization.

166764542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165 (or 1151 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 166764542 is about 12913.7346263581. The cubic root of 166764542 is about 550.4289128120.

The spelling of 166764542 in words is "one hundred sixty-six million, seven hundred sixty-four thousand, five hundred forty-two".