166757604553 has 2 divisors, whose sum is σ = 166757604554. Its totient is φ = 166757604552.

The previous prime is 166757604539. The next prime is 166757604581. The reversal of 166757604553 is 355406757661.

166757604553 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., 161453686969 + 5303917584 = 401813^2 + 72828^2 .

It is a cyclic number.

It is not a de Polignac number, because 166757604553 - 2⁵ = 166757604521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166757604494 and 166757604503.

It is not a weakly prime, because it can be changed into another prime (166757604253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83378802276 + 83378802277.

It is an arithmetic number, because the mean of its divisors is an integer number (83378802277).

Almost surely, 2^166757604553 is an apocalyptic number.

It is an amenable number.

166757604553 is a deficient number, since it is larger than the sum of its proper divisors (1).

166757604553 is an equidigital number, since it uses as much as digits as its factorization.

166757604553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 166757604553 in words is "one hundred sixty-six billion, seven hundred fifty-seven million, six hundred four thousand, five hundred fifty-three".