66892406495 has 4 divisors (see below), whose sum is σ = 80270887800. Its totient is φ = 53513925192.

The previous prime is 66892406491. The next prime is 66892406507. The reversal of 66892406495 is 59460429866.

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 66892406495 - 2² = 66892406491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66892406491) 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, 6689240645 + ... + 6689240654.

It is an arithmetic number, because the mean of its divisors is an integer number (20067721950).

Almost surely, 2^66892406495 is an apocalyptic number.

66892406495 is a deficient number, since it is larger than the sum of its proper divisors (13378481305).

66892406495 is a wasteful number, since it uses less digits than its factorization.

66892406495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13378481304.

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 66892406495 in words is "sixty-six billion, eight hundred ninety-two million, four hundred six thousand, four hundred ninety-five".