1668158622237 has 16 divisors (see below), whose sum is σ = 2364006095360. Its totient is φ = 1043344990512.

The previous prime is 1668158622191. The next prime is 1668158622239. The reversal of 1668158622237 is 7322268518661.

It is not a de Polignac number, because 1668158622237 - 2³² = 1663863654941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668158622239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142061803 + ... + 142073544.

It is an arithmetic number, because the mean of its divisors is an integer number (147750380960).

Almost surely, 2^{1668158622237} is an apocalyptic number.

It is an amenable number.

1668158622237 is a deficient number, since it is larger than the sum of its proper divisors (695847473123).

1668158622237 is a wasteful number, since it uses less digits than its factorization.

1668158622237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284135472.

The product of its digits is 11612160, while the sum is 57.

The spelling of 1668158622237 in words is "one trillion, six hundred sixty-eight billion, one hundred fifty-eight million, six hundred twenty-two thousand, two hundred thirty-seven".