668853047 has 2 divisors, whose sum is σ = 668853048. Its totient is φ = 668853046.

The previous prime is 668853023. The next prime is 668853061. The reversal of 668853047 is 740358866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668853047 - 2¹⁸ = 668590903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668852992 and 668853010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668853947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334426523 + 334426524.

It is an arithmetic number, because the mean of its divisors is an integer number (334426524).

Almost surely, 2^668853047 is an apocalyptic number.

668853047 is a deficient number, since it is larger than the sum of its proper divisors (1).

668853047 is an equidigital number, since it uses as much as digits as its factorization.

668853047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 668853047 is about 25862.1933911260. The cubic root of 668853047 is about 874.5344122229.

The spelling of 668853047 in words is "six hundred sixty-eight million, eight hundred fifty-three thousand, forty-seven".