3625765661 has 16 divisors (see below), whose sum is σ = 4391366400. Its totient is φ = 2922397440.

The previous prime is 3625765651. The next prime is 3625765681. The reversal of 3625765661 is 1665675263.

3625765661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3625765661 - 2⁶ = 3625765597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3625765621) 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, 127640 + ... + 153438.

It is an arithmetic number, because the mean of its divisors is an integer number (274460400).

Almost surely, 2^3625765661 is an apocalyptic number.

It is an amenable number.

3625765661 is a deficient number, since it is larger than the sum of its proper divisors (765600739).

3625765661 is a wasteful number, since it uses less digits than its factorization.

3625765661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27004.

The product of its digits is 1360800, while the sum is 47.

The square root of 3625765661 is about 60214.3310267581. The cubic root of 3625765661 is about 1536.2665593980.

The spelling of 3625765661 in words is "three billion, six hundred twenty-five million, seven hundred sixty-five thousand, six hundred sixty-one".