1000553663 has 8 divisors (see below), whose sum is σ = 1023710400. Its totient is φ = 977555488.

The previous prime is 1000553651. The next prime is 1000553669. The reversal of 1000553663 is 3663550001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000553663 - 2⁴ = 1000553647 is a prime.

It is a super-2 number, since 2×1000553663² = 2002215265085435138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000553669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26828 + ... + 52161.

It is an arithmetic number, because the mean of its divisors is an integer number (127963800).

Almost surely, 2^1000553663 is an apocalyptic number.

1000553663 is a deficient number, since it is larger than the sum of its proper divisors (23156737).

1000553663 is an equidigital number, since it uses as much as digits as its factorization.

1000553663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79281.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 1000553663 is about 31631.5295709834. The cubic root of 1000553663 is about 1000.1845202835.

The spelling of 1000553663 in words is "one billion, five hundred fifty-three thousand, six hundred sixty-three".