3225666861 has 24 divisors (see below), whose sum is σ = 4797224640. Its totient is φ = 2142167256.

The previous prime is 3225666799. The next prime is 3225666877. The reversal of 3225666861 is 1686665223.

It is not a de Polignac number, because 3225666861 - 2⁶ = 3225666797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3225666061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3636160 + ... + 3637046.

It is an arithmetic number, because the mean of its divisors is an integer number (199884360).

Almost surely, 2^3225666861 is an apocalyptic number.

It is an amenable number.

3225666861 is a deficient number, since it is larger than the sum of its proper divisors (1571557779).

3225666861 is an frugal number, since it uses more digits than its factorization.

3225666861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1257 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 3225666861 is about 56794.9545382334. The cubic root of 3225666861 is about 1477.5420091640.

The spelling of 3225666861 in words is "three billion, two hundred twenty-five million, six hundred sixty-six thousand, eight hundred sixty-one".