66877225887 has 8 divisors (see below), whose sum is σ = 89219540736. Its totient is φ = 44559864152.

The previous prime is 66877225859. The next prime is 66877225897. The reversal of 66877225887 is 78852277866.

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

It is a cyclic number.

It is not a de Polignac number, because 66877225887 - 2¹¹ = 66877223839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66877225897) 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, 6232023 + ... + 6242744.

It is an arithmetic number, because the mean of its divisors is an integer number (11152442592).

Almost surely, 2^66877225887 is an apocalyptic number.

66877225887 is a deficient number, since it is larger than the sum of its proper divisors (22342314849).

66877225887 is a wasteful number, since it uses less digits than its factorization.

66877225887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12476557.

The product of its digits is 126443520, while the sum is 66.

The spelling of 66877225887 in words is "sixty-six billion, eight hundred seventy-seven million, two hundred twenty-five thousand, eight hundred eighty-seven".