166872737 has 4 divisors (see below), whose sum is σ = 166902036. Its totient is φ = 166843440.

The previous prime is 166872677. The next prime is 166872749. The reversal of 166872737 is 737278661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24690961 + 142181776 = 4969^2 + 11924^2 .

It is a cyclic number.

It is not a de Polignac number, because 166872737 - 2⁸ = 166872481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166872691 and 166872700.

It is not an unprimeable number, because it can be changed into a prime (166872767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3038 + ... + 18519.

It is an arithmetic number, because the mean of its divisors is an integer number (41725509).

Almost surely, 2^166872737 is an apocalyptic number.

It is an amenable number.

166872737 is a deficient number, since it is larger than the sum of its proper divisors (29299).

166872737 is an equidigital number, since it uses as much as digits as its factorization.

166872737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29298.

The product of its digits is 592704, while the sum is 47.

The square root of 166872737 is about 12917.9230915809. The cubic root of 166872737 is about 550.5479244853.

The spelling of 166872737 in words is "one hundred sixty-six million, eight hundred seventy-two thousand, seven hundred thirty-seven".