668377 has 4 divisors (see below), whose sum is σ = 679396. Its totient is φ = 657360.

The previous prime is 668347. The next prime is 668407. The reversal of 668377 is 773866.

668377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (668347) and next prime (668407).

It can be written as a sum of positive squares in 2 ways, for example, as 179776 + 488601 = 424^2 + 699^2 .

It is a cyclic number.

It is not a de Polignac number, because 668377 - 2¹¹ = 666329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5418 + ... + 5539.

It is an arithmetic number, because the mean of its divisors is an integer number (169849).

2⁶⁶⁸³⁷⁷ is an apocalyptic number.

It is an amenable number.

668377 is a deficient number, since it is larger than the sum of its proper divisors (11019).

668377 is a wasteful number, since it uses less digits than its factorization.

668377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11018.

The product of its digits is 42336, while the sum is 37.

The square root of 668377 is about 817.5432710261. The cubic root of 668377 is about 87.4326883681.

The spelling of 668377 in words is "six hundred sixty-eight thousand, three hundred seventy-seven".