166626653 has 2 divisors, whose sum is σ = 166626654. Its totient is φ = 166626652.

The previous prime is 166626641. The next prime is 166626659. The reversal of 166626653 is 356626661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84143929 + 82482724 = 9173^2 + 9082^2 .

It is a cyclic number.

It is not a de Polignac number, because 166626653 - 2¹⁶ = 166561117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166626653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166626659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83313326 + 83313327.

It is an arithmetic number, because the mean of its divisors is an integer number (83313327).

Almost surely, 2^166626653 is an apocalyptic number.

It is an amenable number.

166626653 is a deficient number, since it is larger than the sum of its proper divisors (1).

166626653 is an equidigital number, since it uses as much as digits as its factorization.

166626653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The square root of 166626653 is about 12908.3946716856. The cubic root of 166626653 is about 550.2771638854.

The spelling of 166626653 in words is "one hundred sixty-six million, six hundred twenty-six thousand, six hundred fifty-three".