2166167707426 has 16 divisors (see below), whose sum is σ = 3261654927864. Its totient is φ = 1078953692544.

The previous prime is 2166167707393. The next prime is 2166167707439. The reversal of 2166167707426 is 6247077616612.

It can be written as a sum of positive squares in 4 ways, for example, as 925249686201 + 1240918021225 = 961899^2 + 1113965^2 .

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, 62901 + ... + 2082376.

Almost surely, 2^{2166167707426} is an apocalyptic number.

2166167707426 is a deficient number, since it is larger than the sum of its proper divisors (1095487220438).

2166167707426 is a wasteful number, since it uses less digits than its factorization.

2166167707426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147205.

The product of its (nonzero) digits is 7112448, while the sum is 55.

The spelling of 2166167707426 in words is "two trillion, one hundred sixty-six billion, one hundred sixty-seven million, seven hundred seven thousand, four hundred twenty-six".