666356353 has 12 divisors (see below), whose sum is σ = 759537840. Its totient is φ = 582721776.

The previous prime is 666356323. The next prime is 666356359. The reversal of 666356353 is 353653666.

It is not a de Polignac number, because 666356353 - 2⁵ = 666356321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666356359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100551 + ... + 106972.

It is an arithmetic number, because the mean of its divisors is an integer number (63294820).

Almost surely, 2^666356353 is an apocalyptic number.

It is an amenable number.

666356353 is a deficient number, since it is larger than the sum of its proper divisors (93181487).

666356353 is a wasteful number, since it uses less digits than its factorization.

666356353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207568 (or 207555 counting only the distinct ones).

The product of its digits is 874800, while the sum is 43.

The square root of 666356353 is about 25813.8790769617. The cubic root of 666356353 is about 873.4449017220. Note that the first 3 decimals are identical.

The spelling of 666356353 in words is "six hundred sixty-six million, three hundred fifty-six thousand, three hundred fifty-three".