13566666678 has 16 divisors (see below), whose sum is σ = 27134896320. Its totient is φ = 4521961736.

The previous prime is 13566666647. The next prime is 13566666683. The reversal of 13566666678 is 87666666531.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68953 + ... + 178571.

It is an arithmetic number, because the mean of its divisors is an integer number (1695931020).

Almost surely, 2^13566666678 is an apocalyptic number.

13566666678 is an abundant number, since it is smaller than the sum of its proper divisors (13568229642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13566666678 is a wasteful number, since it uses less digits than its factorization.

13566666678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130251.

The product of its digits is 39191040, while the sum is 60.

The spelling of 13566666678 in words is "thirteen billion, five hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-eight".