665450611055 has 16 divisors (see below), whose sum is σ = 829504368000. Its totient is φ = 511870410240.

The previous prime is 665450611009. The next prime is 665450611073. The reversal of 665450611055 is 550116054566.

It is a happy number.

It is not a de Polignac number, because 665450611055 - 2¹² = 665450606959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665450610997 and 665450611015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9486455 + ... + 9556344.

It is an arithmetic number, because the mean of its divisors is an integer number (51844023000).

Almost surely, 2^665450611055 is an apocalyptic number.

665450611055 is a deficient number, since it is larger than the sum of its proper divisors (164053756945).

665450611055 is a wasteful number, since it uses less digits than its factorization.

665450611055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19043074.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 665450611055 in words is "six hundred sixty-five billion, four hundred fifty million, six hundred eleven thousand, fifty-five".