1669151761 has 2 divisors, whose sum is σ = 1669151762. Its totient is φ = 1669151760.

The previous prime is 1669151741. The next prime is 1669151777. The reversal of 1669151761 is 1671519661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1669131025 + 20736 = 40855^2 + 144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669151761 - 2⁹ = 1669151249 is a prime.

It is a super-2 number, since 2×1669151761² = 5572135202498802242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1669151711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834575880 + 834575881.

It is an arithmetic number, because the mean of its divisors is an integer number (834575881).

Almost surely, 2^1669151761 is an apocalyptic number.

It is an amenable number.

1669151761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669151761 is an equidigital number, since it uses as much as digits as its factorization.

1669151761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The square root of 1669151761 is about 40855.2537747595. The cubic root of 1669151761 is about 1186.2200898816.

The spelling of 1669151761 in words is "one billion, six hundred sixty-nine million, one hundred fifty-one thousand, seven hundred sixty-one".