665714058761 has 8 divisors (see below), whose sum is σ = 676330413000. Its totient is φ = 655179684480.

The previous prime is 665714058749. The next prime is 665714058769. The reversal of 665714058761 is 167850417566.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16108686400 + 649605372361 = 126920^2 + 805981^2 .

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 665714058761 - 2³⁴ = 648534189577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665714058697 and 665714058706.

It is not an unprimeable number, because it can be changed into a prime (665714058769) 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, 20478620 + ... + 20511101.

It is an arithmetic number, because the mean of its divisors is an integer number (84541301625).

Almost surely, 2^665714058761 is an apocalyptic number.

It is an amenable number.

665714058761 is a deficient number, since it is larger than the sum of its proper divisors (10616354239).

665714058761 is a wasteful number, since it uses less digits than its factorization.

665714058761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40989979.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 665714058761 in words is "six hundred sixty-five billion, seven hundred fourteen million, fifty-eight thousand, seven hundred sixty-one".