666379283 has 4 divisors (see below), whose sum is σ = 666837480. Its totient is φ = 665921088.

The previous prime is 666379279. The next prime is 666379289. The reversal of 666379283 is 382973666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 382973666 = 2 ⋅191486833.

It is a cyclic number.

It is not a de Polignac number, because 666379283 - 2² = 666379279 is a prime.

It is a super-2 number, since 2×666379283² = 888122697623188178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666379289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226910 + ... + 229827.

It is an arithmetic number, because the mean of its divisors is an integer number (166709370).

Almost surely, 2^666379283 is an apocalyptic number.

666379283 is a deficient number, since it is larger than the sum of its proper divisors (458197).

666379283 is a wasteful number, since it uses less digits than its factorization.

666379283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458196.

The product of its digits is 1959552, while the sum is 50.

The square root of 666379283 is about 25814.3232140608. The cubic root of 666379283 is about 873.4549203163.

The spelling of 666379283 in words is "six hundred sixty-six million, three hundred seventy-nine thousand, two hundred eighty-three".