1866156744223 has 8 divisors (see below), whose sum is σ = 1871385451776. Its totient is φ = 1860932199000.

The previous prime is 1866156744217. The next prime is 1866156744233. The reversal of 1866156744223 is 3224476516681.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1866156744223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866156744233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141553 + ... + 1937098.

It is an arithmetic number, because the mean of its divisors is an integer number (233923181472).

Almost surely, 2^{1866156744223} is an apocalyptic number.

1866156744223 is a deficient number, since it is larger than the sum of its proper divisors (5228707553).

1866156744223 is a wasteful number, since it uses less digits than its factorization.

1866156744223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081165.

The product of its digits is 11612160, while the sum is 55.

The spelling of 1866156744223 in words is "one trillion, eight hundred sixty-six billion, one hundred fifty-six million, seven hundred forty-four thousand, two hundred twenty-three".