665276705 has 8 divisors (see below), whose sum is σ = 799025472. Its totient is φ = 531759088.

The previous prime is 665276671. The next prime is 665276707. The reversal of 665276705 is 507672566.

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

It is a cyclic number.

It is not a de Polignac number, because 665276705 - 2⁶ = 665276641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665276707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51389 + ... + 63018.

It is an arithmetic number, because the mean of its divisors is an integer number (99878184).

Almost surely, 2^665276705 is an apocalyptic number.

It is an amenable number.

665276705 is a deficient number, since it is larger than the sum of its proper divisors (133748767).

665276705 is a wasteful number, since it uses less digits than its factorization.

665276705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115575.

The product of its (nonzero) digits is 529200, while the sum is 44.

The square root of 665276705 is about 25792.9584383025. The cubic root of 665276705 is about 872.9729206296.

The spelling of 665276705 in words is "six hundred sixty-five million, two hundred seventy-six thousand, seven hundred five".