201366626623 has 4 divisors (see below), whose sum is σ = 207862324288. Its totient is φ = 194870928960.

The previous prime is 201366626581. The next prime is 201366626627. The reversal of 201366626623 is 326626663102.

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 201366626623 - 2³⁷ = 63927673151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201366626623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201366626627) 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, 3247848786 + ... + 3247848847.

It is an arithmetic number, because the mean of its divisors is an integer number (51965581072).

Almost surely, 2^201366626623 is an apocalyptic number.

201366626623 is a deficient number, since it is larger than the sum of its proper divisors (6495697665).

201366626623 is an equidigital number, since it uses as much as digits as its factorization.

201366626623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6495697664.

The product of its (nonzero) digits is 559872, while the sum is 43.

The spelling of 201366626623 in words is "two hundred one billion, three hundred sixty-six million, six hundred twenty-six thousand, six hundred twenty-three".