166215354625343 has 4 divisors (see below), whose sum is σ = 166215650596368. Its totient is φ = 166215058654320.

The previous prime is 166215354625303. The next prime is 166215354625357. The reversal of 166215354625343 is 343526453512661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166215354625343 - 2⁴⁴ = 148623168580927 is a prime.

It is a super-2 number, since 2×166215354625343² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166215354625303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147141518 + ... + 148266843.

It is an arithmetic number, because the mean of its divisors is an integer number (41553912649092).

Almost surely, 2^{166215354625343} is an apocalyptic number.

166215354625343 is a deficient number, since it is larger than the sum of its proper divisors (295971025).

166215354625343 is an equidigital number, since it uses as much as digits as its factorization.

166215354625343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295971024.

The product of its digits is 46656000, while the sum is 56.

The spelling of 166215354625343 in words is "one hundred sixty-six trillion, two hundred fifteen billion, three hundred fifty-four million, six hundred twenty-five thousand, three hundred forty-three".