3456666653623 has 4 divisors (see below), whose sum is σ = 3466923825040. Its totient is φ = 3446409482208.

The previous prime is 3456666653597. The next prime is 3456666653647. The reversal of 3456666653623 is 3263566666543.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3456666653623 is a prime.

It is a super-2 number, since 2×3456666653623² (a number of 26 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 (3456666653723) 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, 5128585203 + ... + 5128585876.

It is an arithmetic number, because the mean of its divisors is an integer number (866730956260).

Almost surely, 2^{3456666653623} is an apocalyptic number.

3456666653623 is a deficient number, since it is larger than the sum of its proper divisors (10257171417).

3456666653623 is a wasteful number, since it uses less digits than its factorization.

3456666653623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257171416.

The product of its digits is 251942400, while the sum is 61.

The spelling of 3456666653623 in words is "three trillion, four hundred fifty-six billion, six hundred sixty-six million, six hundred fifty-three thousand, six hundred twenty-three".