66878164054 has 16 divisors (see below), whose sum is σ = 108360357840. Its totient is φ = 30773587680.

The previous prime is 66878164037. The next prime is 66878164057. The reversal of 66878164054 is 45046187866.

It is a junction number, because it is equal to n+sod(n) for n = 66878163986 and 66878164004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66878164057) 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, 3876949 + ... + 3894160.

It is an arithmetic number, because the mean of its divisors is an integer number (6772522365).

Almost surely, 2^66878164054 is an apocalyptic number.

66878164054 is a deficient number, since it is larger than the sum of its proper divisors (41482193786).

66878164054 is a wasteful number, since it uses less digits than its factorization.

66878164054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771455.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 66878164054 in words is "sixty-six billion, eight hundred seventy-eight million, one hundred sixty-four thousand, fifty-four".