166816742 has 8 divisors (see below), whose sum is σ = 251272800. Its totient is φ = 83059144.

The previous prime is 166816721. The next prime is 166816763. The reversal of 166816742 is 247618661.

It is an interprime number because it is at equal distance from previous prime (166816721) and next prime (166816763).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×166816742² = 55655650822989128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166816742.

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, 174017 + ... + 174972.

It is an arithmetic number, because the mean of its divisors is an integer number (31409100).

Almost surely, 2^166816742 is an apocalyptic number.

166816742 is a deficient number, since it is larger than the sum of its proper divisors (84456058).

166816742 is a wasteful number, since it uses less digits than its factorization.

166816742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349230.

The product of its digits is 96768, while the sum is 41.

The square root of 166816742 is about 12915.7555721684. The cubic root of 166816742 is about 550.4863378727.

The spelling of 166816742 in words is "one hundred sixty-six million, eight hundred sixteen thousand, seven hundred forty-two".