3665640650 has 24 divisors (see below), whose sum is σ = 7792105440. Its totient is φ = 1256790960.

The previous prime is 3665640619. The next prime is 3665640689. The reversal of 3665640650 is 560465663.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3665640598 and 3665640607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5236280 + ... + 5236979.

It is an arithmetic number, because the mean of its divisors is an integer number (324671060).

Almost surely, 2^3665640650 is an apocalyptic number.

3665640650 is an abundant number, since it is smaller than the sum of its proper divisors (4126464790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3665640650 is a wasteful number, since it uses less digits than its factorization.

3665640650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10473278 (or 10473273 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 3665640650 is about 60544.5344354055. The cubic root of 3665640650 is about 1541.8778254067.

The spelling of 3665640650 in words is "three billion, six hundred sixty-five million, six hundred forty thousand, six hundred fifty".