166400627 has 4 divisors (see below), whose sum is σ = 166720536. Its totient is φ = 166080720.

The previous prime is 166400609. The next prime is 166400657. The reversal of 166400627 is 726004661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 726004661 = 2441 ⋅297421.

It is a cyclic number.

It is not a de Polignac number, because 166400627 - 2⁸ = 166400371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166400593 and 166400602.

It is not an unprimeable number, because it can be changed into a prime (166400657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159173 + ... + 160214.

It is an arithmetic number, because the mean of its divisors is an integer number (41680134).

Almost surely, 2^166400627 is an apocalyptic number.

166400627 is a deficient number, since it is larger than the sum of its proper divisors (319909).

166400627 is an equidigital number, since it uses as much as digits as its factorization.

166400627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319908.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 166400627 is about 12899.6367003106. The cubic root of 166400627 is about 550.0282376687.

The spelling of 166400627 in words is "one hundred sixty-six million, four hundred thousand, six hundred twenty-seven".