3561665975 has 12 divisors (see below), whose sum is σ = 5047389744. Its totient is φ = 2442285120.

The previous prime is 3561665959. The next prime is 3561666007. The reversal of 3561665975 is 5795661653.

3561665975 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3561665975 - 2⁴ = 3561665959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10176014 + ... + 10176363.

It is an arithmetic number, because the mean of its divisors is an integer number (420615812).

Almost surely, 2^3561665975 is an apocalyptic number.

3561665975 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3561665975 is a deficient number, since it is larger than the sum of its proper divisors (1485723769).

3561665975 is a wasteful number, since it uses less digits than its factorization.

3561665975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20352394 (or 20352389 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 53.

The square root of 3561665975 is about 59679.6948299838. The cubic root of 3561665975 is about 1527.1594918715.

The spelling of 3561665975 in words is "three billion, five hundred sixty-one million, six hundred sixty-five thousand, nine hundred seventy-five".