3661331669 has 2 divisors, whose sum is σ = 3661331670. Its totient is φ = 3661331668.

The previous prime is 3661331623. The next prime is 3661331677. The reversal of 3661331669 is 9661331663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3631629169 + 29702500 = 60263^2 + 5450^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661331669 - 2⁸ = 3661331413 is a prime.

It is a super-2 number, since 2×3661331669² = 26810699180844651122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661331689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830665834 + 1830665835.

It is an arithmetic number, because the mean of its divisors is an integer number (1830665835).

Almost surely, 2^3661331669 is an apocalyptic number.

It is an amenable number.

3661331669 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661331669 is an equidigital number, since it uses as much as digits as its factorization.

3661331669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 44.

The square root of 3661331669 is about 60508.9387528818. The cubic root of 3661331669 is about 1541.2734265296.

The spelling of 3661331669 in words is "three billion, six hundred sixty-one million, three hundred thirty-one thousand, six hundred sixty-nine".