1066645157 has 2 divisors, whose sum is σ = 1066645158. Its totient is φ = 1066645156.

The previous prime is 1066645091. The next prime is 1066645169. The reversal of 1066645157 is 7515466601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020866401 + 45778756 = 31951^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066645157 - 2¹² = 1066641061 is a prime.

It is a super-2 number, since 2×1066645157² = 2275463781903109298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066641157) 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, 533322578 + 533322579.

It is an arithmetic number, because the mean of its divisors is an integer number (533322579).

Almost surely, 2^1066645157 is an apocalyptic number.

It is an amenable number.

1066645157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066645157 is an equidigital number, since it uses as much as digits as its factorization.

1066645157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 1066645157 is about 32659.5339372747. The cubic root of 1066645157 is about 1021.7390418700.

The spelling of 1066645157 in words is "one billion, sixty-six million, six hundred forty-five thousand, one hundred fifty-seven".