166086403 has 16 divisors (see below), whose sum is σ = 193294080. Its totient is φ = 139771296.

The previous prime is 166086397. The next prime is 166086421. The reversal of 166086403 is 304680661.

It is not a de Polignac number, because 166086403 - 2⁹ = 166085891 is a prime.

It is a super-2 number, since 2×166086403² = 55169386522956818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166086463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103201 + ... + 104797.

It is an arithmetic number, because the mean of its divisors is an integer number (12080880).

Almost surely, 2^166086403 is an apocalyptic number.

166086403 is a deficient number, since it is larger than the sum of its proper divisors (27207677).

166086403 is a wasteful number, since it uses less digits than its factorization.

166086403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 166086403 is about 12887.4513772119. The cubic root of 166086403 is about 549.6818027223.

The spelling of 166086403 in words is "one hundred sixty-six million, eighty-six thousand, four hundred three".