1004875661 has 8 divisors (see below), whose sum is σ = 1064339640. Its totient is φ = 945451008.

The previous prime is 1004875609. The next prime is 1004875679. The reversal of 1004875661 is 1665784001.

It can be written as a sum of positive squares in 4 ways, for example, as 249450436 + 755425225 = 15794^2 + 27485^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1004875661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004875561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55085 + ... + 71021.

It is an arithmetic number, because the mean of its divisors is an integer number (133042455).

Almost surely, 2^1004875661 is an apocalyptic number.

It is an amenable number.

1004875661 is a deficient number, since it is larger than the sum of its proper divisors (59463979).

1004875661 is a wasteful number, since it uses less digits than its factorization.

1004875661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19663.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1004875661 is about 31699.7738320008. The cubic root of 1004875661 is about 1001.6225861236.

The spelling of 1004875661 in words is "one billion, four million, eight hundred seventy-five thousand, six hundred sixty-one".