3661542737 has 2 divisors, whose sum is σ = 3661542738. Its totient is φ = 3661542736.

The previous prime is 3661542719. The next prime is 3661542767. The reversal of 3661542737 is 7372451663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2929082641 + 732460096 = 54121^2 + 27064^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661542737 - 2²⁶ = 3594433873 is a prime.

It is not a weakly prime, because it can be changed into another prime (3661542767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830771368 + 1830771369.

It is an arithmetic number, because the mean of its divisors is an integer number (1830771369).

Almost surely, 2^3661542737 is an apocalyptic number.

It is an amenable number.

3661542737 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661542737 is an equidigital number, since it uses as much as digits as its factorization.

3661542737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 44.

The square root of 3661542737 is about 60510.6828336947. The cubic root of 3661542737 is about 1541.3030430078.

The spelling of 3661542737 in words is "three billion, six hundred sixty-one million, five hundred forty-two thousand, seven hundred thirty-seven".