666342583 has 4 divisors (see below), whose sum is σ = 684351880. Its totient is φ = 648333288.

The previous prime is 666342571. The next prime is 666342601. The reversal of 666342583 is 385243666.

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

It is a cyclic number.

It is not a de Polignac number, because 666342583 - 2⁹ = 666342071 is a prime.

It is a super-2 number, since 2×666342583² = 888024875838223778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666342563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9004593 + ... + 9004666.

It is an arithmetic number, because the mean of its divisors is an integer number (171087970).

Almost surely, 2^666342583 is an apocalyptic number.

666342583 is a deficient number, since it is larger than the sum of its proper divisors (18009297).

666342583 is a wasteful number, since it uses less digits than its factorization.

666342583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18009296.

The product of its digits is 622080, while the sum is 43.

The square root of 666342583 is about 25813.6123585987. The cubic root of 666342583 is about 873.4388852119.

The spelling of 666342583 in words is "six hundred sixty-six million, three hundred forty-two thousand, five hundred eighty-three".