166616749 has 8 divisors (see below), whose sum is σ = 180375552. Its totient is φ = 152992560.

The previous prime is 166616729. The next prime is 166616753. The reversal of 166616749 is 947616661.

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

It is a cyclic number.

It is not a de Polignac number, because 166616749 - 2⁷ = 166616621 is a prime.

It is a super-2 number, since 2×166616749² = 55522282094658002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166616699 and 166616708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166616729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31069 + ... + 36034.

It is an arithmetic number, because the mean of its divisors is an integer number (22546944).

Almost surely, 2^166616749 is an apocalyptic number.

It is an amenable number.

166616749 is a deficient number, since it is larger than the sum of its proper divisors (13758803).

166616749 is a wasteful number, since it uses less digits than its factorization.

166616749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67307.

The product of its digits is 326592, while the sum is 46.

The square root of 166616749 is about 12908.0110396606. The cubic root of 166616749 is about 550.2662611618.

The spelling of 166616749 in words is "one hundred sixty-six million, six hundred sixteen thousand, seven hundred forty-nine".