5205666650465 has 16 divisors (see below), whose sum is σ = 6309464196240. Its totient is φ = 4122767827200.

The previous prime is 5205666650417. The next prime is 5205666650473. The reversal of 5205666650465 is 5640566665025.

It can be written as a sum of positive squares in 8 ways, for example, as 314487667264 + 4891178983201 = 560792^2 + 2211601^2 .

It is not a de Polignac number, because 5205666650465 - 2³⁸ = 4930788743521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5205666650465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3271727 + ... + 4595163.

It is an arithmetic number, because the mean of its divisors is an integer number (394341512265).

Almost surely, 2^{5205666650465} is an apocalyptic number.

It is an amenable number.

5205666650465 is a deficient number, since it is larger than the sum of its proper divisors (1103797545775).

5205666650465 is a wasteful number, since it uses less digits than its factorization.

5205666650465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331332.

The product of its (nonzero) digits is 38880000, while the sum is 56.

The spelling of 5205666650465 in words is "five trillion, two hundred five billion, six hundred sixty-six million, six hundred fifty thousand, four hundred sixty-five".