66878777119 has 16 divisors (see below), whose sum is σ = 83776525056. Its totient is φ = 51866337600.

The previous prime is 66878777089. The next prime is 66878777123. The reversal of 66878777119 is 91177787866.

It is not a de Polignac number, because 66878777119 - 2³⁵ = 32519038751 is a prime.

It is a super-2 number, since 2×66878777119² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66878777149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2041942 + ... + 2074435.

It is an arithmetic number, because the mean of its divisors is an integer number (5236032816).

Almost surely, 2^66878777119 is an apocalyptic number.

66878777119 is a deficient number, since it is larger than the sum of its proper divisors (16897747937).

66878777119 is a wasteful number, since it uses less digits than its factorization.

66878777119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116606.

The product of its digits is 49787136, while the sum is 67.

It can be divided in two parts, 668 and 78777119, that added together give a palindrome (78777787).

The spelling of 66878777119 in words is "sixty-six billion, eight hundred seventy-eight million, seven hundred seventy-seven thousand, one hundred nineteen".