505406352666 has 16 divisors (see below), whose sum is σ = 1025899462944. Its totient is φ = 165954324624.

The previous prime is 505406352617. The next prime is 505406352721. The reversal of 505406352666 is 666253604505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628614465 + ... + 628615268.

It is an arithmetic number, because the mean of its divisors is an integer number (64118716434).

Almost surely, 2^505406352666 is an apocalyptic number.

505406352666 is an abundant number, since it is smaller than the sum of its proper divisors (520493110278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505406352666 is a wasteful number, since it uses less digits than its factorization.

505406352666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257229805.

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 505406352666 in words is "five hundred five billion, four hundred six million, three hundred fifty-two thousand, six hundred sixty-six".