165266623623 has 8 divisors (see below), whose sum is σ = 223374066928. Its totient is φ = 108668464704.

The previous prime is 165266623591. The next prime is 165266623637. The reversal of 165266623623 is 326326662561.

It is a happy number.

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

It is not a de Polignac number, because 165266623623 - 2⁵ = 165266623591 is a prime.

It is a super-2 number, since 2×165266623623² (a number of 23 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 (165266623663) 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, 377320840 + ... + 377321277.

It is an arithmetic number, because the mean of its divisors is an integer number (27921758366).

Almost surely, 2^165266623623 is an apocalyptic number.

165266623623 is a deficient number, since it is larger than the sum of its proper divisors (58107443305).

165266623623 is an equidigital number, since it uses as much as digits as its factorization.

165266623623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754642193.

The product of its digits is 2799360, while the sum is 48.

The spelling of 165266623623 in words is "one hundred sixty-five billion, two hundred sixty-six million, six hundred twenty-three thousand, six hundred twenty-three".