3641767661 has 12 divisors (see below), whose sum is σ = 4350839868. Its totient is φ = 3037148352.

The previous prime is 3641767631. The next prime is 3641767663. The reversal of 3641767661 is 1667671463.

3641767661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1960275625 + 1681492036 = 44275^2 + 41006^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3641767661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3641767663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002536 + ... + 1006161.

It is an arithmetic number, because the mean of its divisors is an integer number (362569989).

Almost surely, 2^3641767661 is an apocalyptic number.

It is an amenable number.

3641767661 is a deficient number, since it is larger than the sum of its proper divisors (709072207).

3641767661 is a wasteful number, since it uses less digits than its factorization.

3641767661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008748 (or 2008741 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The square root of 3641767661 is about 60347.0600858070. The cubic root of 3641767661 is about 1538.5233020856.

The spelling of 3641767661 in words is "three billion, six hundred forty-one million, seven hundred sixty-seven thousand, six hundred sixty-one".