166222553 has 12 divisors (see below), whose sum is σ = 194890752. Its totient is φ = 141349320.

The previous prime is 166222547. The next prime is 166222559. The reversal of 166222553 is 355222661.

It is an interprime number because it is at equal distance from previous prime (166222547) and next prime (166222559).

It is not a de Polignac number, because 166222553 - 2⁶ = 166222489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166222559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7133 + ... + 19578.

It is an arithmetic number, because the mean of its divisors is an integer number (16240896).

Almost surely, 2^166222553 is an apocalyptic number.

It is an amenable number.

166222553 is a deficient number, since it is larger than the sum of its proper divisors (28668199).

166222553 is a wasteful number, since it uses less digits than its factorization.

166222553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26852 (or 26845 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 166222553 is about 12892.7325652865. The cubic root of 166222553 is about 549.8319629913.

The spelling of 166222553 in words is "one hundred sixty-six million, two hundred twenty-two thousand, five hundred fifty-three".