3500664665 has 8 divisors (see below), whose sum is σ = 4303256328. Its totient is φ = 2732225920.

The previous prime is 3500664659. The next prime is 3500664691. The reversal of 3500664665 is 5664660053.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 446223376 + 3054441289 = 21124^2 + 55267^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3500664665 - 2⁴ = 3500664649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8538002 + ... + 8538411.

It is an arithmetic number, because the mean of its divisors is an integer number (537907041).

Almost surely, 2^3500664665 is an apocalyptic number.

It is an amenable number.

3500664665 is a deficient number, since it is larger than the sum of its proper divisors (802591663).

3500664665 is a wasteful number, since it uses less digits than its factorization.

3500664665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17076459.

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

The square root of 3500664665 is about 59166.4150088545. The cubic root of 3500664665 is about 1518.3905900645.

The spelling of 3500664665 in words is "three billion, five hundred million, six hundred sixty-four thousand, six hundred sixty-five".