166880747 has 4 divisors (see below), whose sum is σ = 182051736. Its totient is φ = 151709760.

The previous prime is 166880737. The next prime is 166880771. The reversal of 166880747 is 747088661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747088661 = 11 ⋅67917151.

It is a cyclic number.

It is not a de Polignac number, because 166880747 - 2⁶ = 166880683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166880717) 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 3 ways as a sum of consecutive naturals, for example, 7585478 + ... + 7585499.

It is an arithmetic number, because the mean of its divisors is an integer number (45512934).

Almost surely, 2^166880747 is an apocalyptic number.

166880747 is a deficient number, since it is larger than the sum of its proper divisors (15170989).

166880747 is a wasteful number, since it uses less digits than its factorization.

166880747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15170988.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 166880747 is about 12918.2331222192. The cubic root of 166880747 is about 550.5567332307.

The spelling of 166880747 in words is "one hundred sixty-six million, eight hundred eighty thousand, seven hundred forty-seven".