14166042778 has 16 divisors (see below), whose sum is σ = 22923521640. Its totient is φ = 6540591616.

The previous prime is 14166042739. The next prime is 14166042797. The reversal of 14166042778 is 87724066141.

It can be written as a sum of positive squares in 4 ways, for example, as 13527318249 + 638724529 = 116307^2 + 25273^2 .

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, 3928843 + ... + 3932446.

Almost surely, 2^14166042778 is an apocalyptic number.

14166042778 is a deficient number, since it is larger than the sum of its proper divisors (8757478862).

14166042778 is a wasteful number, since it uses less digits than its factorization.

14166042778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861361.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 14166042778 in words is "fourteen billion, one hundred sixty-six million, forty-two thousand, seven hundred seventy-eight".