665055611026 has 8 divisors (see below), whose sum is σ = 997829684784. Its totient is φ = 332445716100.

The previous prime is 665055611021. The next prime is 665055611029. The reversal of 665055611026 is 620116550566.

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

It is not an unprimeable number, because it can be changed into a prime (665055611021) 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, 41034580 + ... + 41050783.

It is an arithmetic number, because the mean of its divisors is an integer number (124728710598).

Almost surely, 2^665055611026 is an apocalyptic number.

665055611026 is a deficient number, since it is larger than the sum of its proper divisors (332774073758).

665055611026 is a wasteful number, since it uses less digits than its factorization.

665055611026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82089416.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 665055611026 in words is "six hundred sixty-five billion, fifty-five million, six hundred eleven thousand, twenty-six".