166355222134256 has 20 divisors (see below), whose sum is σ = 322313825394000. Its totient is φ = 83177460742272.

The previous prime is 166355222134247. The next prime is 166355222134261. The reversal of 166355222134256 is 652431222553661.

It is a super-4 number, since 4×166355222134256⁴ (a number of 58 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166355222134198 and 166355222134207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20405 + ... + 18240363.

It is an arithmetic number, because the mean of its divisors is an integer number (16115691269700).

Almost surely, 2^{166355222134256} is an apocalyptic number.

166355222134256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166355222134256 is a deficient number, since it is larger than the sum of its proper divisors (155958603259744).

166355222134256 is a wasteful number, since it uses less digits than its factorization.

166355222134256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18790616 (or 18790610 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 53.

The spelling of 166355222134256 in words is "one hundred sixty-six trillion, three hundred fifty-five billion, two hundred twenty-two million, one hundred thirty-four thousand, two hundred fifty-six".