7890189066 has 24 divisors (see below), whose sum is σ = 17246700900. Its totient is φ = 2606787456.

The previous prime is 7890189053. The next prime is 7890189079. The reversal of 7890189066 is 6609810987.

It is an interprime number because it is at equal distance from previous prime (7890189053) and next prime (7890189079).

It can be written as a sum of positive squares in 2 ways, for example, as 6680610225 + 1209578841 = 81735^2 + 34779^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1937541 + ... + 1941608.

Almost surely, 2^7890189066 is an apocalyptic number.

7890189066 is an abundant number, since it is smaller than the sum of its proper divisors (9356511834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7890189066 is a wasteful number, since it uses less digits than its factorization.

7890189066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879270 (or 3879267 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 7890189066 is about 88826.7362115709. The cubic root of 7890189066 is about 1990.8068970068.

The spelling of 7890189066 in words is "seven billion, eight hundred ninety million, one hundred eighty-nine thousand, sixty-six".