1000664730 has 48 divisors (see below), whose sum is σ = 2801864520. Its totient is φ = 246317184.

The previous prime is 1000664723. The next prime is 1000664759. The reversal of 1000664730 is 374660001.

1000664730 is a `hidden beast` number, since 10 + 0 + 0 + 6 + 647 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 646735761 + 353928969 = 25431^2 + 18813^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1000664694 and 1000664703.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426465 + ... + 428804.

Almost surely, 2^1000664730 is an apocalyptic number.

1000664730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000664730 is an abundant number, since it is smaller than the sum of its proper divisors (1801199790).

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

1000664730 is a wasteful number, since it uses less digits than its factorization.

1000664730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855295 (or 855292 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1000664730 is about 31633.2851597807. The cubic root of 1000664730 is about 1000.2215275886.

The spelling of 1000664730 in words is "one billion, six hundred sixty-four thousand, seven hundred thirty".