3661661577 has 16 divisors (see below), whose sum is σ = 5586917760. Its totient is φ = 2089661952.

The previous prime is 3661661527. The next prime is 3661661581. The reversal of 3661661577 is 7751661663.

It is not a de Polignac number, because 3661661577 - 2⁸ = 3661661321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3661661527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96552 + ... + 129017.

It is an arithmetic number, because the mean of its divisors is an integer number (349182360).

Almost surely, 2^3661661577 is an apocalyptic number.

It is an amenable number.

3661661577 is a deficient number, since it is larger than the sum of its proper divisors (1925256183).

3661661577 is a wasteful number, since it uses less digits than its factorization.

3661661577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226352.

The product of its digits is 952560, while the sum is 48.

The square root of 3661661577 is about 60511.6648010943. The cubic root of 3661661577 is about 1541.3197178072.

The spelling of 3661661577 in words is "three billion, six hundred sixty-one million, six hundred sixty-one thousand, five hundred seventy-seven".