2167666621054 has 24 divisors (see below), whose sum is σ = 3574056800160. Its totient is φ = 985277076960.

The previous prime is 2167666620947. The next prime is 2167666621111. The reversal of 2167666621054 is 4501266667612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2167666620992 and 2167666621010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11427307 + ... + 11615449.

It is an arithmetic number, because the mean of its divisors is an integer number (148919033340).

Almost surely, 2^{2167666621054} is an apocalyptic number.

2167666621054 is a deficient number, since it is larger than the sum of its proper divisors (1406390179106).

2167666621054 is a wasteful number, since it uses less digits than its factorization.

2167666621054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235776 (or 235765 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 2167666621054 in words is "two trillion, one hundred sixty-seven billion, six hundred sixty-six million, six hundred twenty-one thousand, fifty-four".