66403369671 has 4 divisors (see below), whose sum is σ = 88537826232. Its totient is φ = 44268913112.

The previous prime is 66403369663. The next prime is 66403369687. The reversal of 66403369671 is 17696330466.

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 66403369671 - 2³ = 66403369663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66403369631) 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, 11067228276 + ... + 11067228281.

It is an arithmetic number, because the mean of its divisors is an integer number (22134456558).

Almost surely, 2^66403369671 is an apocalyptic number.

66403369671 is a deficient number, since it is larger than the sum of its proper divisors (22134456561).

66403369671 is a wasteful number, since it uses less digits than its factorization.

66403369671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22134456560.

The product of its (nonzero) digits is 2939328, while the sum is 51.

The spelling of 66403369671 in words is "sixty-six billion, four hundred three million, three hundred sixty-nine thousand, six hundred seventy-one".