166274729 has 2 divisors, whose sum is σ = 166274730. Its totient is φ = 166274728.

The previous prime is 166274663. The next prime is 166274741. The reversal of 166274729 is 927472661.

166274729 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., 107599129 + 58675600 = 10373^2 + 7660^2 .

It is an emirp because it is prime and its reverse (927472661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166274729 - 2⁸ = 166274473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166274729.

It is not a weakly prime, because it can be changed into another prime (166274029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83137364 + 83137365.

It is an arithmetic number, because the mean of its divisors is an integer number (83137365).

Almost surely, 2^166274729 is an apocalyptic number.

It is an amenable number.

166274729 is a deficient number, since it is larger than the sum of its proper divisors (1).

166274729 is an equidigital number, since it uses as much as digits as its factorization.

166274729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 166274729 is about 12894.7558720590. The cubic root of 166274729 is about 549.8894863355.

The spelling of 166274729 in words is "one hundred sixty-six million, two hundred seventy-four thousand, seven hundred twenty-nine".