2166967539405 has 64 divisors (see below), whose sum is σ = 3881564912640. Its totient is φ = 1146991104000.

The previous prime is 2166967539389. The next prime is 2166967539449. The reversal of 2166967539405 is 5049357696612.

2166967539405 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 96 + 7 + 539 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 2166967539405 - 2⁴ = 2166967539389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10870380 + ... + 11067930.

It is an arithmetic number, because the mean of its divisors is an integer number (60649451760).

Almost surely, 2^{2166967539405} is an apocalyptic number.

It is an amenable number.

2166967539405 is a deficient number, since it is larger than the sum of its proper divisors (1714597373235).

2166967539405 is a wasteful number, since it uses less digits than its factorization.

2166967539405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198179 (or 198173 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 63.

The spelling of 2166967539405 in words is "two trillion, one hundred sixty-six billion, nine hundred sixty-seven million, five hundred thirty-nine thousand, four hundred five".