166513153 has 2 divisors, whose sum is σ = 166513154. Its totient is φ = 166513152.

The previous prime is 166513141. The next prime is 166513159. The reversal of 166513153 is 351315661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123387664 + 43125489 = 11108^2 + 6567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166513153 is a prime.

It is not a weakly prime, because it can be changed into another prime (166513159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83256576 + 83256577.

It is an arithmetic number, because the mean of its divisors is an integer number (83256577).

Almost surely, 2^166513153 is an apocalyptic number.

It is an amenable number.

166513153 is a deficient number, since it is larger than the sum of its proper divisors (1).

166513153 is an equidigital number, since it uses as much as digits as its factorization.

166513153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 31.

The square root of 166513153 is about 12903.9975588962. The cubic root of 166513153 is about 550.1521925931.

The spelling of 166513153 in words is "one hundred sixty-six million, five hundred thirteen thousand, one hundred fifty-three".