3661091699 has 2 divisors, whose sum is σ = 3661091700. Its totient is φ = 3661091698.

The previous prime is 3661091683. The next prime is 3661091771. The reversal of 3661091699 is 9961901663.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3661091699 - 2⁴ = 3661091683 is a prime.

It is not a weakly prime, because it can be changed into another prime (3661091669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830545849 + 1830545850.

It is an arithmetic number, because the mean of its divisors is an integer number (1830545850).

Almost surely, 2^3661091699 is an apocalyptic number.

3661091699 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661091699 is an equidigital number, since it uses as much as digits as its factorization.

3661091699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 50.

The square root of 3661091699 is about 60506.9557902230. The cubic root of 3661091699 is about 1541.2397532200.

The spelling of 3661091699 in words is "three billion, six hundred sixty-one million, ninety-one thousand, six hundred ninety-nine".