1003256566 has 32 divisors (see below), whose sum is σ = 1689891840. Its totient is φ = 443511936.

The previous prime is 1003256549. The next prime is 1003256587. The reversal of 1003256566 is 6656523001.

It is a super-2 number, since 2×1003256566² = 2013047474444224712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90520 + ... + 100996.

It is an arithmetic number, because the mean of its divisors is an integer number (52809120).

Almost surely, 2^1003256566 is an apocalyptic number.

1003256566 is a deficient number, since it is larger than the sum of its proper divisors (686635274).

1003256566 is a wasteful number, since it uses less digits than its factorization.

1003256566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10648.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1003256566 is about 31674.2255785362. The cubic root of 1003256566 is about 1001.0843457693.

Adding to 1003256566 its reverse (6656523001), we get a palindrome (7659779567).

The spelling of 1003256566 in words is "one billion, three million, two hundred fifty-six thousand, five hundred sixty-six".