166119553 has 2 divisors, whose sum is σ = 166119554. Its totient is φ = 166119552.

The previous prime is 166119523. The next prime is 166119559. The reversal of 166119553 is 355911661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117007489 + 49112064 = 10817^2 + 7008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166119553 is a prime.

It is not a weakly prime, because it can be changed into another prime (166119559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83059776 + 83059777.

It is an arithmetic number, because the mean of its divisors is an integer number (83059777).

Almost surely, 2^166119553 is an apocalyptic number.

It is an amenable number.

166119553 is a deficient number, since it is larger than the sum of its proper divisors (1).

166119553 is an equidigital number, since it uses as much as digits as its factorization.

166119553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 37.

The square root of 166119553 is about 12888.7374478651. The cubic root of 166119553 is about 549.7183715187.

The spelling of 166119553 in words is "one hundred sixty-six million, one hundred nineteen thousand, five hundred fifty-three".