3666371641 has 2 divisors, whose sum is σ = 3666371642. Its totient is φ = 3666371640.

The previous prime is 3666371591. The next prime is 3666371663. The reversal of 3666371641 is 1461736663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3579509241 + 86862400 = 59829^2 + 9320^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666371641 - 2¹⁵ = 3666338873 is a prime.

It is not a weakly prime, because it can be changed into another prime (3666371041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833185820 + 1833185821.

It is an arithmetic number, because the mean of its divisors is an integer number (1833185821).

Almost surely, 2^3666371641 is an apocalyptic number.

It is an amenable number.

3666371641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666371641 is an equidigital number, since it uses as much as digits as its factorization.

3666371641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 3666371641 is about 60550.5709386790. The cubic root of 3666371641 is about 1541.9803108027.

The spelling of 3666371641 in words is "three billion, six hundred sixty-six million, three hundred seventy-one thousand, six hundred forty-one".