668826543 has 64 divisors (see below), whose sum is σ = 1183150080. Its totient is φ = 325555200.

The previous prime is 668826527. The next prime is 668826551. The reversal of 668826543 is 345628866.

It is not a de Polignac number, because 668826543 - 2⁴ = 668826527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668826492 and 668826501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668826553) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 424948 + ... + 426518.

It is an arithmetic number, because the mean of its divisors is an integer number (18486720).

Almost surely, 2^668826543 is an apocalyptic number.

668826543 is a deficient number, since it is larger than the sum of its proper divisors (514323537).

668826543 is a wasteful number, since it uses less digits than its factorization.

668826543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its digits is 1658880, while the sum is 48.

The square root of 668826543 is about 25861.6809778483. The cubic root of 668826543 is about 874.5228606241.

The spelling of 668826543 in words is "six hundred sixty-eight million, eight hundred twenty-six thousand, five hundred forty-three".