16665234623 has 16 divisors (see below), whose sum is σ = 18045970560. Its totient is φ = 15332928000.

The previous prime is 16665234611. The next prime is 16665234631. The reversal of 16665234623 is 32643256661.

It is a cyclic number.

It is not a de Polignac number, because 16665234623 - 2⁶ = 16665234559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665234673) 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, 74213 + ... + 197073.

It is an arithmetic number, because the mean of its divisors is an integer number (1127873160).

Almost surely, 2^16665234623 is an apocalyptic number.

16665234623 is a deficient number, since it is larger than the sum of its proper divisors (1380735937).

16665234623 is a wasteful number, since it uses less digits than its factorization.

16665234623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123058.

The product of its digits is 933120, while the sum is 44.

The spelling of 16665234623 in words is "sixteen billion, six hundred sixty-five million, two hundred thirty-four thousand, six hundred twenty-three".