505364540666 has 4 divisors (see below), whose sum is σ = 758046811002. Its totient is φ = 252682270332.

The previous prime is 505364540641. The next prime is 505364540719. The reversal of 505364540666 is 666045463505.

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

It can be written as a sum of positive squares in only one way, i.e., 501647809441 + 3716731225 = 708271^2 + 60965^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126341135165 + ... + 126341135168.

Almost surely, 2^505364540666 is an apocalyptic number.

505364540666 is a deficient number, since it is larger than the sum of its proper divisors (252682270336).

505364540666 is a wasteful number, since it uses less digits than its factorization.

505364540666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252682270335.

The product of its (nonzero) digits is 7776000, while the sum is 50.

The spelling of 505364540666 in words is "five hundred five billion, three hundred sixty-four million, five hundred forty thousand, six hundred sixty-six".