668282586073 has 4 divisors (see below), whose sum is σ = 668369598388. Its totient is φ = 668195573760.

The previous prime is 668282586061. The next prime is 668282586079. The reversal of 668282586073 is 370685282866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 565785282969 + 102497303104 = 752187^2 + 320152^2 .

It is a cyclic number.

It is not a de Polignac number, because 668282586073 - 2³⁷ = 530843632601 is a prime.

It is a super-3 number, since 3×668282586073³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668282586079) 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, 43494636 + ... + 43509997.

It is an arithmetic number, because the mean of its divisors is an integer number (167092399597).

Almost surely, 2^668282586073 is an apocalyptic number.

It is an amenable number.

668282586073 is a deficient number, since it is larger than the sum of its proper divisors (87012315).

668282586073 is an equidigital number, since it uses as much as digits as its factorization.

668282586073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87012314.

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 668282586073 in words is "six hundred sixty-eight billion, two hundred eighty-two million, five hundred eighty-six thousand, seventy-three".