3666636601 has 4 divisors (see below), whose sum is σ = 3756066804. Its totient is φ = 3577206400.

The previous prime is 3666636593. The next prime is 3666636607. The reversal of 3666636601 is 1066366663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1066366663 = 41 ⋅26008943.

It can be written as a sum of positive squares in 2 ways, for example, as 1491813376 + 2174823225 = 38624^2 + 46635^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666636601 - 2³ = 3666636593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3666636607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44715040 + ... + 44715121.

It is an arithmetic number, because the mean of its divisors is an integer number (939016701).

Almost surely, 2^3666636601 is an apocalyptic number.

It is an amenable number.

3666636601 is a deficient number, since it is larger than the sum of its proper divisors (89430203).

3666636601 is an equidigital number, since it uses as much as digits as its factorization.

3666636601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89430202.

The product of its (nonzero) digits is 419904, while the sum is 43.

The square root of 3666636601 is about 60552.7588223691. The cubic root of 3666636601 is about 1542.0174549970.

The spelling of 3666636601 in words is "three billion, six hundred sixty-six million, six hundred thirty-six thousand, six hundred one".