2166611267897 has 8 divisors (see below), whose sum is σ = 2294082494496. Its totient is φ = 2039142652992.

The previous prime is 2166611267893. The next prime is 2166611267903. The reversal of 2166611267897 is 7987621166612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166611267897 - 2² = 2166611267893 is a prime.

It is a super-3 number, since 3×2166611267897³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2166611267893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206338 + ... + 2405924.

It is an arithmetic number, because the mean of its divisors is an integer number (286760311812).

Almost surely, 2^{2166611267897} is an apocalyptic number.

It is an amenable number.

2166611267897 is a deficient number, since it is larger than the sum of its proper divisors (127471226599).

2166611267897 is a wasteful number, since it uses less digits than its factorization.

2166611267897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305847.

The product of its digits is 18289152, while the sum is 62.

The spelling of 2166611267897 in words is "two trillion, one hundred sixty-six billion, six hundred eleven million, two hundred sixty-seven thousand, eight hundred ninety-seven".