663145105023 has 12 divisors (see below), whose sum is σ = 990906479160. Its totient is φ = 426852021456.

The previous prime is 663145105001. The next prime is 663145105027. The reversal of 663145105023 is 320501541366.

663145105023 is a `hidden beast` number, since 6 + 6 + 3 + 145 + 1 + 0 + 502 + 3 = 666.

It is not a de Polignac number, because 663145105023 - 2⁵ = 663145104991 is a prime.

It is a super-2 number, since 2×663145105023² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663145105027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1270392661 + ... + 1270393182.

It is an arithmetic number, because the mean of its divisors is an integer number (82575539930).

Almost surely, 2^663145105023 is an apocalyptic number.

663145105023 is a deficient number, since it is larger than the sum of its proper divisors (327761374137).

663145105023 is a wasteful number, since it uses less digits than its factorization.

663145105023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540785878 (or 2540785875 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 663145105023 its reverse (320501541366), we get a palindrome (983646646389).

The spelling of 663145105023 in words is "six hundred sixty-three billion, one hundred forty-five million, one hundred five thousand, twenty-three".