666013507045 has 4 divisors (see below), whose sum is σ = 799216208460. Its totient is φ = 532810805632.

The previous prime is 666013507021. The next prime is 666013507079. The reversal of 666013507045 is 540705310666.

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 125632675809 + 540380831236 = 354447^2 + 735106^2 .

It is a cyclic number.

It is not a de Polignac number, because 666013507045 - 2¹¹ = 666013504997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666013506992 and 666013507010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66601350700 + ... + 66601350709.

It is an arithmetic number, because the mean of its divisors is an integer number (199804052115).

Almost surely, 2^666013507045 is an apocalyptic number.

It is an amenable number.

666013507045 is a deficient number, since it is larger than the sum of its proper divisors (133202701415).

666013507045 is a wasteful number, since it uses less digits than its factorization.

666013507045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133202701414.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 666013507045 in words is "six hundred sixty-six billion, thirteen million, five hundred seven thousand, forty-five".