1666563523232 has 12 divisors (see below), whose sum is σ = 3281046936426. Its totient is φ = 833281761600.

The previous prime is 1666563523223. The next prime is 1666563523241. The reversal of 1666563523232 is 2323253656661.

It is an interprime number because it is at equal distance from previous prime (1666563523223) and next prime (1666563523241).

It can be written as a sum of positive squares in only one way, i.e., 1449336685456 + 217226837776 = 1203884^2 + 466076^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26040055019 + ... + 26040055082.

Almost surely, 2^{1666563523232} is an apocalyptic number.

It is an amenable number.

1666563523232 is a deficient number, since it is larger than the sum of its proper divisors (1614483413194).

1666563523232 is an equidigital number, since it uses as much as digits as its factorization.

1666563523232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52080110111 (or 52080110103 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 50.

The spelling of 1666563523232 in words is "one trillion, six hundred sixty-six billion, five hundred sixty-three million, five hundred twenty-three thousand, two hundred thirty-two".