666060651005 has 8 divisors (see below), whose sum is σ = 799292762712. Its totient is φ = 532835199808.

The previous prime is 666060650989. The next prime is 666060651007. The reversal of 666060651005 is 500156060666.

It can be written as a sum of positive squares in 4 ways, for example, as 57503080804 + 608557570201 = 239798^2 + 780101^2 .

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 666060651005 - 2⁴ = 666060650989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666060651007) 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, 1442414 + ... + 1847343.

It is an arithmetic number, because the mean of its divisors is an integer number (99911595339).

Almost surely, 2^666060651005 is an apocalyptic number.

It is an amenable number.

666060651005 is a deficient number, since it is larger than the sum of its proper divisors (133232111707).

666060651005 is a wasteful number, since it uses less digits than its factorization.

666060651005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330255.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 666060651005 in words is "six hundred sixty-six billion, sixty million, six hundred fifty-one thousand, five".