1000661506 has 48 divisors (see below), whose sum is σ = 1714777344. Its totient is φ = 436879872.

The previous prime is 1000661477. The next prime is 1000661509. The reversal of 1000661506 is 6051660001.

It is not an unprimeable number, because it can be changed into a prime (1000661509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 753415 + ... + 754741.

It is an arithmetic number, because the mean of its divisors is an integer number (35724528).

Almost surely, 2^1000661506 is an apocalyptic number.

1000661506 is a deficient number, since it is larger than the sum of its proper divisors (714115838).

1000661506 is a wasteful number, since it uses less digits than its factorization.

1000661506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475 (or 1462 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1000661506 is about 31633.2342007579. The cubic root of 1000661506 is about 1000.2204533967.

The spelling of 1000661506 in words is "one billion, six hundred sixty-one thousand, five hundred six".