662666531355338 has 4 divisors (see below), whose sum is σ = 993999797033010. Its totient is φ = 331333265677668.

The previous prime is 662666531355313. The next prime is 662666531355343. The reversal of 662666531355338 is 833553135666266.

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

It can be written as a sum of positive squares in only one way, i.e., 656219263867729 + 6447267487609 = 25616777^2 + 2539147^2 .

It is a super-2 number, since 2×662666531355338² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165666632838833 + ... + 165666632838836.

Almost surely, 2^{662666531355338} is an apocalyptic number.

662666531355338 is a deficient number, since it is larger than the sum of its proper divisors (331333265677672).

662666531355338 is a wasteful number, since it uses less digits than its factorization.

662666531355338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331333265677671.

The product of its digits is 1259712000, while the sum is 68.

The spelling of 662666531355338 in words is "six hundred sixty-two trillion, six hundred sixty-six billion, five hundred thirty-one million, three hundred fifty-five thousand, three hundred thirty-eight".