3198661875 has 90 divisors (see below), whose sum is σ = 6112715180. Its totient is φ = 1606824000.

The previous prime is 3198661853. The next prime is 3198661897. The reversal of 3198661875 is 5781668913.

3198661875 is a `hidden beast` number, since 3 + 19 + 8 + 6 + 618 + 7 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (3198661853) and next prime (3198661897).

It is not a de Polignac number, because 3198661875 - 2¹⁴ = 3198645491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 18489289 + ... + 18489461.

Almost surely, 2^3198661875 is an apocalyptic number.

3198661875 is a deficient number, since it is larger than the sum of its proper divisors (2914053305).

3198661875 is an equidigital number, since it uses as much as digits as its factorization.

3198661875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 200 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 3198661875 is about 56556.7137924402. The cubic root of 3198661875 is about 1473.4071668749.

The spelling of 3198661875 in words is "three billion, one hundred ninety-eight million, six hundred sixty-one thousand, eight hundred seventy-five".