665484371 has 4 divisors (see below), whose sum is σ = 665577600. Its totient is φ = 665391144.

The previous prime is 665484361. The next prime is 665484427. The reversal of 665484371 is 173484566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173484566 = 2 ⋅86742283.

It is a cyclic number.

It is not a de Polignac number, because 665484371 - 2¹⁰ = 665483347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665484341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34931 + ... + 50508.

It is an arithmetic number, because the mean of its divisors is an integer number (166394400).

Almost surely, 2^665484371 is an apocalyptic number.

665484371 is a deficient number, since it is larger than the sum of its proper divisors (93229).

665484371 is an equidigital number, since it uses as much as digits as its factorization.

665484371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93228.

The product of its digits is 483840, while the sum is 44.

The square root of 665484371 is about 25796.9837577962. The cubic root of 665484371 is about 873.0637439585.

The spelling of 665484371 in words is "six hundred sixty-five million, four hundred eighty-four thousand, three hundred seventy-one".