166891403139 has 8 divisors (see below), whose sum is σ = 222565412112. Its totient is φ = 111239164800.

The previous prime is 166891403117. The next prime is 166891403143. The reversal of 166891403139 is 931304198661.

166891403139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166891403139 - 2⁸ = 166891402883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166891403091 and 166891403100.

It is not an unprimeable number, because it can be changed into a prime (166891405139) 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 7 ways as a sum of consecutive naturals, for example, 5424762 + ... + 5455439.

It is an arithmetic number, because the mean of its divisors is an integer number (27820676514).

Almost surely, 2^166891403139 is an apocalyptic number.

166891403139 is a deficient number, since it is larger than the sum of its proper divisors (55674008973).

166891403139 is a wasteful number, since it uses less digits than its factorization.

166891403139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10885317.

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 166891403139 in words is "one hundred sixty-six billion, eight hundred ninety-one million, four hundred three thousand, one hundred thirty-nine".