66825061103 has 4 divisors (see below), whose sum is σ = 67473848208. Its totient is φ = 66176274000.

The previous prime is 66825061049. The next prime is 66825061109. The reversal of 66825061103 is 30116052866.

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 66825061103 - 2¹⁴ = 66825044719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66825061109) 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, 324393398 + ... + 324393603.

It is an arithmetic number, because the mean of its divisors is an integer number (16868462052).

Almost surely, 2^66825061103 is an apocalyptic number.

66825061103 is a deficient number, since it is larger than the sum of its proper divisors (648787105).

66825061103 is a wasteful number, since it uses less digits than its factorization.

66825061103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648787104.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 66825061103 in words is "sixty-six billion, eight hundred twenty-five million, sixty-one thousand, one hundred three".