662668439 has 4 divisors (see below), whose sum is σ = 662721456. Its totient is φ = 662615424.

The previous prime is 662668429. The next prime is 662668451. The reversal of 662668439 is 934866266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 934866266 = 2 ⋅467433133.

It is a cyclic number.

It is not a de Polignac number, because 662668439 - 2⁴ = 662668423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662668429) 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, 3767 + ... + 36599.

It is an arithmetic number, because the mean of its divisors is an integer number (165680364).

Almost surely, 2^662668439 is an apocalyptic number.

662668439 is a deficient number, since it is larger than the sum of its proper divisors (53017).

662668439 is a wasteful number, since it uses less digits than its factorization.

662668439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53016.

The product of its digits is 2239488, while the sum is 50.

The square root of 662668439 is about 25742.3471929038. The cubic root of 662668439 is about 871.8305750397.

The spelling of 662668439 in words is "six hundred sixty-two million, six hundred sixty-eight thousand, four hundred thirty-nine".