2166302563551 has 36 divisors (see below), whose sum is σ = 3640082525352. Its totient is φ = 1237851556704.

The previous prime is 2166302563549. The next prime is 2166302563553. The reversal of 2166302563551 is 1553652036612.

2166302563551 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 3 + 0 + 2 + 5 + 635 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2166302563549) and next prime (2166302563553).

It is not a de Polignac number, because 2166302563551 - 2¹ = 2166302563549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166302563497 and 2166302563506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166302563553) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27102321 + ... + 27182133.

It is an arithmetic number, because the mean of its divisors is an integer number (101113403482).

Almost surely, 2^{2166302563551} is an apocalyptic number.

2166302563551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2166302563551 is a deficient number, since it is larger than the sum of its proper divisors (1473779961801).

2166302563551 is a wasteful number, since it uses less digits than its factorization.

2166302563551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141380 (or 141370 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 2166302563551 in words is "two trillion, one hundred sixty-six billion, three hundred two million, five hundred sixty-three thousand, five hundred fifty-one".