1663540166352 has 20 divisors (see below), whose sum is σ = 4297478763200. Its totient is φ = 554513388768.

The previous prime is 1663540166333. The next prime is 1663540166371. The reversal of 1663540166352 is 2536610453661.

It is an interprime number because it is at equal distance from previous prime (1663540166333) and next prime (1663540166371).

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 34657086799 = 1663540166352 / (1 + 6 + 6 + 3 + 5 + 4 + 0 + 1 + 6 + 6 + 3 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17328543352 + ... + 17328543447.

It is an arithmetic number, because the mean of its divisors is an integer number (214873938160).

Almost surely, 2^{1663540166352} is an apocalyptic number.

1663540166352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1663540166352 is an abundant number, since it is smaller than the sum of its proper divisors (2633938596848).

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

1663540166352 is a wasteful number, since it uses less digits than its factorization.

1663540166352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34657086810 (or 34657086804 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 1663540166352 in words is "one trillion, six hundred sixty-three billion, five hundred forty million, one hundred sixty-six thousand, three hundred fifty-two".