665357323426 has 8 divisors (see below), whose sum is σ = 1005216100560. Its totient is φ = 330285289908.

The previous prime is 665357323409. The next prime is 665357323429. The reversal of 665357323426 is 624323753566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×665357323426² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665357323429) 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, 1196685556 + ... + 1196686111.

It is an arithmetic number, because the mean of its divisors is an integer number (125652012570).

Almost surely, 2^665357323426 is an apocalyptic number.

665357323426 is a deficient number, since it is larger than the sum of its proper divisors (339858777134).

665357323426 is a wasteful number, since it uses less digits than its factorization.

665357323426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393371808.

The product of its digits is 16329600, while the sum is 52.

The spelling of 665357323426 in words is "six hundred sixty-five billion, three hundred fifty-seven million, three hundred twenty-three thousand, four hundred twenty-six".