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166407 = 355469
BaseRepresentation
bin101000101000000111
322110021020
4220220013
520311112
63322223
71262103
oct505007
9273236
10166407
1110402a
1280373
135a987
1444903
153448c
hex28a07

166407 has 4 divisors (see below), whose sum is σ = 221880. Its totient is φ = 110936.

The previous prime is 166403. The next prime is 166409. The reversal of 166407 is 704661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166407 - 22 = 166403 is a prime.

It is a D-number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27732 + ... + 27737.

It is an arithmetic number, because the mean of its divisors is an integer number (55470).

2166407 is an apocalyptic number.

166407 is a deficient number, since it is larger than the sum of its proper divisors (55473).

166407 is an equidigital number, since it uses as much as digits as its factorization.

166407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55472.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 166407 is about 407.9301410781. The cubic root of 166407 is about 55.0035259448.

The spelling of 166407 in words is "one hundred sixty-six thousand, four hundred seven".

Divisors: 1 3 55469 166407