206166491379 has 16 divisors (see below), whose sum is σ = 307197348000. Its totient is φ = 136649848608.

The previous prime is 206166491317. The next prime is 206166491387. The reversal of 206166491379 is 973194661602.

206166491379 is a `hidden beast` number, since 2 + 0 + 61 + 66 + 491 + 37 + 9 = 666.

It is not a de Polignac number, because 206166491379 - 2¹² = 206166487283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206166492379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22064104 + ... + 22073445.

It is an arithmetic number, because the mean of its divisors is an integer number (19199834250).

Almost surely, 2^206166491379 is an apocalyptic number.

206166491379 is a deficient number, since it is larger than the sum of its proper divisors (101030856621).

206166491379 is a wasteful number, since it uses less digits than its factorization.

206166491379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44137731 (or 44137725 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 206166491379 in words is "two hundred six billion, one hundred sixty-six million, four hundred ninety-one thousand, three hundred seventy-nine".