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668348423 = 3643183461
BaseRepresentation
bin100111110101100…
…011000000000111
31201120121121200022
4213311203000013
52332044122143
6150153005355
722363603451
oct4765430007
91646547608
10668348423
113132a1076
121679b385b
13a8609752
1464a992d1
153da1e268
hex27d63007

668348423 has 4 divisors (see below), whose sum is σ = 668535528. Its totient is φ = 668161320.

The previous prime is 668348407. The next prime is 668348431. The reversal of 668348423 is 324843866.

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 668348423 - 24 = 668348407 is a prime.

It is a super-2 number, since 2×6683484232 = 893379229053173858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668308423) 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, 88088 + ... + 95373.

It is an arithmetic number, because the mean of its divisors is an integer number (167133882).

Almost surely, 2668348423 is an apocalyptic number.

668348423 is a deficient number, since it is larger than the sum of its proper divisors (187105).

668348423 is a wasteful number, since it uses less digits than its factorization.

668348423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187104.

The product of its digits is 663552, while the sum is 44.

The square root of 668348423 is about 25852.4355332336. The cubic root of 668348423 is about 874.3144226523.

It can be divided in two parts, 66834 and 8423, that added together give a palindrome (75257).

The spelling of 668348423 in words is "six hundred sixty-eight million, three hundred forty-eight thousand, four hundred twenty-three".

Divisors: 1 3643 183461 668348423