665226373405 has 8 divisors (see below), whose sum is σ = 870841797984. Its totient is φ = 483800998800.

The previous prime is 665226373393. The next prime is 665226373421. The reversal of 665226373405 is 504373622566.

665226373405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 665226373405 - 2⁵ = 665226373373 is a prime.

It is a super-2 number, since 2×665226373405² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6047512431 + ... + 6047512540.

It is an arithmetic number, because the mean of its divisors is an integer number (108855224748).

Almost surely, 2^665226373405 is an apocalyptic number.

It is an amenable number.

665226373405 is a deficient number, since it is larger than the sum of its proper divisors (205615424579).

665226373405 is a wasteful number, since it uses less digits than its factorization.

665226373405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12095024987.

The product of its (nonzero) digits is 5443200, while the sum is 49.

The spelling of 665226373405 in words is "six hundred sixty-five billion, two hundred twenty-six million, three hundred seventy-three thousand, four hundred five".