668162471 has 2 divisors, whose sum is σ = 668162472. Its totient is φ = 668162470.

The previous prime is 668162461. The next prime is 668162477. The reversal of 668162471 is 174261866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668162471 is a prime.

It is a super-3 number, since 3×668162471³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668162477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334081235 + 334081236.

It is an arithmetic number, because the mean of its divisors is an integer number (334081236).

Almost surely, 2^668162471 is an apocalyptic number.

668162471 is a deficient number, since it is larger than the sum of its proper divisors (1).

668162471 is an equidigital number, since it uses as much as digits as its factorization.

668162471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 668162471 is about 25848.8388714077. The cubic root of 668162471 is about 874.2333294229.

The spelling of 668162471 in words is "six hundred sixty-eight million, one hundred sixty-two thousand, four hundred seventy-one".