1000661875 has 10 divisors (see below), whose sum is σ = 1250427860. Its totient is φ = 800529000.

The previous prime is 1000661863. The next prime is 1000661891. The reversal of 1000661875 is 5781660001.

It is not a de Polignac number, because 1000661875 - 2¹⁷ = 1000530803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000661875.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 799905 + ... + 801154.

It is an arithmetic number, because the mean of its divisors is an integer number (125042786).

Almost surely, 2^1000661875 is an apocalyptic number.

1000661875 is a deficient number, since it is larger than the sum of its proper divisors (249765985).

1000661875 is an frugal number, since it uses more digits than its factorization.

1000661875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601079 (or 1601064 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1000661875 is about 31633.2400332309. The cubic root of 1000661875 is about 1000.2205763425.

The spelling of 1000661875 in words is "one billion, six hundred sixty-one thousand, eight hundred seventy-five".