505212640666 has 8 divisors (see below), whose sum is σ = 757823787360. Its totient is φ = 252604711548.

The previous prime is 505212640571. The next prime is 505212640799. The reversal of 505212640666 is 666046212505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 363526 + ... + 1068913.

It is an arithmetic number, because the mean of its divisors is an integer number (94727973420).

Almost surely, 2^505212640666 is an apocalyptic number.

505212640666 is a deficient number, since it is larger than the sum of its proper divisors (252611146694).

505212640666 is a wasteful number, since it uses less digits than its factorization.

505212640666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608788.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 505212640666 in words is "five hundred five billion, two hundred twelve million, six hundred forty thousand, six hundred sixty-six".