2166245671140 has 72 divisors (see below), whose sum is σ = 6916784434560. Its totient is φ = 547262063424.

The previous prime is 2166245671129. The next prime is 2166245671147. The reversal of 2166245671140 is 411765426612.

2166245671140 is a `hidden beast` number, since 2 + 1 + 6 + 624 + 5 + 6 + 7 + 1 + 14 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2166245671147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316699164 + ... + 316706003.

It is an arithmetic number, because the mean of its divisors is an integer number (96066450480).

Almost surely, 2^{2166245671140} is an apocalyptic number.

2166245671140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166245671140 is an abundant number, since it is smaller than the sum of its proper divisors (4750538763420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166245671140 is a wasteful number, since it uses less digits than its factorization.

2166245671140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633405201 (or 633405196 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 2166245671140 in words is "two trillion, one hundred sixty-six billion, two hundred forty-five million, six hundred seventy-one thousand, one hundred forty".