3640665603 has 16 divisors (see below), whose sum is σ = 4915290240. Its totient is φ = 2396606784.

The previous prime is 3640665599. The next prime is 3640665619. The reversal of 3640665603 is 3065660463.

It is a happy number.

It is not a de Polignac number, because 3640665603 - 2² = 3640665599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3640665403) 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, 852688 + ... + 856946.

It is an arithmetic number, because the mean of its divisors is an integer number (307205640).

Almost surely, 2^3640665603 is an apocalyptic number.

3640665603 is a deficient number, since it is larger than the sum of its proper divisors (1274624637).

3640665603 is a wasteful number, since it uses less digits than its factorization.

3640665603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778.

The product of its (nonzero) digits is 233280, while the sum is 39.

The square root of 3640665603 is about 60337.9283949988. The cubic root of 3640665603 is about 1538.3680923877.

The spelling of 3640665603 in words is "three billion, six hundred forty million, six hundred sixty-five thousand, six hundred three".