66973557103 has 4 divisors (see below), whose sum is σ = 66976398088. Its totient is φ = 66970716120.

The previous prime is 66973557089. The next prime is 66973557107. The reversal of 66973557103 is 30175537966.

It is a happy number.

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 66973557103 - 2¹⁷ = 66973426031 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 (66973557107) 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, 1384833 + ... + 1432378.

It is an arithmetic number, because the mean of its divisors is an integer number (16744099522).

Almost surely, 2^66973557103 is an apocalyptic number.

66973557103 is a deficient number, since it is larger than the sum of its proper divisors (2840985).

66973557103 is a wasteful number, since it uses less digits than its factorization.

66973557103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840984.

The product of its (nonzero) digits is 3572100, while the sum is 52.

The spelling of 66973557103 in words is "sixty-six billion, nine hundred seventy-three million, five hundred fifty-seven thousand, one hundred three".