668053443 has 8 divisors (see below), whose sum is σ = 895659856. Its totient is φ = 442908000.

The previous prime is 668053427. The next prime is 668053457. The reversal of 668053443 is 344350866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668053443 - 2⁴ = 668053427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668053493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614608 + ... + 615693.

It is an arithmetic number, because the mean of its divisors is an integer number (111957482).

Almost surely, 2^668053443 is an apocalyptic number.

668053443 is a deficient number, since it is larger than the sum of its proper divisors (227606413).

668053443 is a wasteful number, since it uses less digits than its factorization.

668053443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230485.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 668053443 is about 25846.7298318375. The cubic root of 668053443 is about 874.1857755716.

The spelling of 668053443 in words is "six hundred sixty-eight million, fifty-three thousand, four hundred forty-three".