472505212667666 has 8 divisors (see below), whose sum is σ = 708975429640380. Its totient is φ = 236180069454208.

The previous prime is 472505212667629. The next prime is 472505212667687. The reversal of 472505212667666 is 666766212505274.

It can be written as a sum of positive squares in 2 ways, for example, as 456195560800225 + 16309651867441 = 21358735^2 + 4038521^2 .

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

It is a super-2 number, since 2×472505212667666² (a number of 30 digits) contains 22 as substring.

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, 36268431671 + ... + 36268444698.

Almost surely, 2^{472505212667666} is an apocalyptic number.

472505212667666 is a deficient number, since it is larger than the sum of its proper divisors (236470216972714).

472505212667666 is a wasteful number, since it uses less digits than its factorization.

472505212667666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72536879628.

The product of its (nonzero) digits is 304819200, while the sum is 65.

The spelling of 472505212667666 in words is "four hundred seventy-two trillion, five hundred five billion, two hundred twelve million, six hundred sixty-seven thousand, six hundred sixty-six".