165266420123 has 8 divisors (see below), whose sum is σ = 188909084640. Its totient is φ = 141632049600.

The previous prime is 165266420093. The next prime is 165266420147. The reversal of 165266420123 is 321024662561.

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-165266420123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165266420323) 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, 2030738 + ... + 2110551.

It is an arithmetic number, because the mean of its divisors is an integer number (23613635580).

Almost surely, 2^165266420123 is an apocalyptic number.

165266420123 is a deficient number, since it is larger than the sum of its proper divisors (23642664517).

165266420123 is an equidigital number, since it uses as much as digits as its factorization.

165266420123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146997.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 165266420123 in words is "one hundred sixty-five billion, two hundred sixty-six million, four hundred twenty thousand, one hundred twenty-three".