166904737 has 2 divisors, whose sum is σ = 166904738. Its totient is φ = 166904736.

The previous prime is 166904711. The next prime is 166904747. The reversal of 166904737 is 737409661.

166904737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146870161 + 20034576 = 12119^2 + 4476^2 .

It is an emirp because it is prime and its reverse (737409661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166904737 - 2¹¹ = 166902689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166904693 and 166904702.

It is not a weakly prime, because it can be changed into another prime (166904707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83452368 + 83452369.

It is an arithmetic number, because the mean of its divisors is an integer number (83452369).

Almost surely, 2^166904737 is an apocalyptic number.

It is an amenable number.

166904737 is a deficient number, since it is larger than the sum of its proper divisors (1).

166904737 is an equidigital number, since it uses as much as digits as its factorization.

166904737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 166904737 is about 12919.1616214056. The cubic root of 166904737 is about 550.5831137917.

The spelling of 166904737 in words is "one hundred sixty-six million, nine hundred four thousand, seven hundred thirty-seven".