1003666435656 has 32 divisors (see below), whose sum is σ = 2510224504800. Its totient is φ = 334414356480.

The previous prime is 1003666435643. The next prime is 1003666435661. The reversal of 1003666435656 is 6565346663001.

It is a junction number, because it is equal to n+sod(n) for n = 1003666435599 and 1003666435608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8762041 + ... + 8875848.

It is an arithmetic number, because the mean of its divisors is an integer number (78444515775).

Almost surely, 2^{1003666435656} is an apocalyptic number.

It is an amenable number.

1003666435656 is an abundant number, since it is smaller than the sum of its proper divisors (1506558069144).

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

1003666435656 is a wasteful number, since it uses less digits than its factorization.

1003666435656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17640269 (or 17640265 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 51.

The spelling of 1003666435656 in words is "one trillion, three billion, six hundred sixty-six million, four hundred thirty-five thousand, six hundred fifty-six".