16663620351101 has 16 divisors (see below), whose sum is σ = 17426919847680. Its totient is φ = 15919459000320.

The previous prime is 16663620351071. The next prime is 16663620351179. The reversal of 16663620351101 is 10115302636661.

It is a cyclic number.

It is not a de Polignac number, because 16663620351101 - 2³⁰ = 16662546609277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663628351101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12780341 + ... + 14023706.

It is an arithmetic number, because the mean of its divisors is an integer number (1089182490480).

Almost surely, 2^{16663620351101} is an apocalyptic number.

It is an amenable number.

16663620351101 is a deficient number, since it is larger than the sum of its proper divisors (763299496579).

16663620351101 is a wasteful number, since it uses less digits than its factorization.

16663620351101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26804404.

The product of its (nonzero) digits is 116640, while the sum is 41.

Adding to 16663620351101 its reverse (10115302636661), we get a palindrome (26778922987762).

The spelling of 16663620351101 in words is "sixteen trillion, six hundred sixty-three billion, six hundred twenty million, three hundred fifty-one thousand, one hundred one".