3661225771 has 16 divisors (see below), whose sum is σ = 4202150400. Its totient is φ = 3124807488.

The previous prime is 3661225747. The next prime is 3661225781. The reversal of 3661225771 is 1775221663.

It is a cyclic number.

It is not a de Polignac number, because 3661225771 - 2²⁵ = 3627671339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3661225781) 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, 2372026 + ... + 2373568.

It is an arithmetic number, because the mean of its divisors is an integer number (262634400).

Almost surely, 2^3661225771 is an apocalyptic number.

3661225771 is a deficient number, since it is larger than the sum of its proper divisors (540924629).

3661225771 is a wasteful number, since it uses less digits than its factorization.

3661225771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778.

The product of its digits is 105840, while the sum is 40.

The square root of 3661225771 is about 60508.0636857601. The cubic root of 3661225771 is about 1541.2585667863.

The spelling of 3661225771 in words is "three billion, six hundred sixty-one million, two hundred twenty-five thousand, seven hundred seventy-one".