668211495 has 16 divisors (see below), whose sum is σ = 1221872640. Its totient is φ = 305468064.

The previous prime is 668211463. The next prime is 668211499. The reversal of 668211495 is 594112866.

668211495 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668211495 - 2⁵ = 668211463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668211499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3181855 + ... + 3182064.

It is an arithmetic number, because the mean of its divisors is an integer number (76367040).

Almost surely, 2^668211495 is an apocalyptic number.

668211495 is a deficient number, since it is larger than the sum of its proper divisors (553661145).

668211495 is a wasteful number, since it uses less digits than its factorization.

668211495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363934.

The product of its digits is 103680, while the sum is 42.

The square root of 668211495 is about 25849.7871364543. The cubic root of 668211495 is about 874.2547101342.

The spelling of 668211495 in words is "six hundred sixty-eight million, two hundred eleven thousand, four hundred ninety-five".