66842512877 has 8 divisors (see below), whose sum is σ = 76416278400. Its totient is φ = 57274956144.

The previous prime is 66842512819. The next prime is 66842512889. The reversal of 66842512877 is 77821524866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66842512877 - 2⁶ = 66842512813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66842512817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529102 + ... + 1572207.

It is an arithmetic number, because the mean of its divisors is an integer number (9552034800).

Almost surely, 2^66842512877 is an apocalyptic number.

It is an amenable number.

66842512877 is a deficient number, since it is larger than the sum of its proper divisors (9573765523).

66842512877 is a wasteful number, since it uses less digits than its factorization.

66842512877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104395.

The product of its digits is 9031680, while the sum is 56.

The spelling of 66842512877 in words is "sixty-six billion, eight hundred forty-two million, five hundred twelve thousand, eight hundred seventy-seven".