166767553 has 2 divisors, whose sum is σ = 166767554. Its totient is φ = 166767552.

The previous prime is 166767529. The next prime is 166767581. The reversal of 166767553 is 355767661.

166767553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91546624 + 75220929 = 9568^2 + 8673^2 .

It is a cyclic number.

It is not a de Polignac number, because 166767553 - 2²⁵ = 133213121 is a prime.

It is a super-2 number, since 2×166767553² = 55622833467215618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166767053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83383776 + 83383777.

It is an arithmetic number, because the mean of its divisors is an integer number (83383777).

Almost surely, 2^166767553 is an apocalyptic number.

It is an amenable number.

166767553 is a deficient number, since it is larger than the sum of its proper divisors (1).

166767553 is an equidigital number, since it uses as much as digits as its factorization.

166767553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 46.

The square root of 166767553 is about 12913.8512071341. The cubic root of 166767553 is about 550.4322255295.

The spelling of 166767553 in words is "one hundred sixty-six million, seven hundred sixty-seven thousand, five hundred fifty-three".