1066617949 has 2 divisors, whose sum is σ = 1066617950. Its totient is φ = 1066617948.

The previous prime is 1066617913. The next prime is 1066617973. The reversal of 1066617949 is 9497166601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 852932025 + 213685924 = 29205^2 + 14618^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066617949 - 2⁷ = 1066617821 is a prime.

It is a super-2 number, since 2×1066617949² = 2275347698257933202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066617049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533308974 + 533308975.

It is an arithmetic number, because the mean of its divisors is an integer number (533308975).

Almost surely, 2^1066617949 is an apocalyptic number.

It is an amenable number.

1066617949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066617949 is an equidigital number, since it uses as much as digits as its factorization.

1066617949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 1066617949 is about 32659.1173946878. The cubic root of 1066617949 is about 1021.7303542848.

The spelling of 1066617949 in words is "one billion, sixty-six million, six hundred seventeen thousand, nine hundred forty-nine".