47537473666 has 4 divisors (see below), whose sum is σ = 71306210502. Its totient is φ = 23768736832.

The previous prime is 47537473651. The next prime is 47537473679. The reversal of 47537473666 is 66637473574.

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., 33060330625 + 14477143041 = 181825^2 + 120321^2 .

It is a super-2 number, since 2×47537473666² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 47537473666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11884368415 + ... + 11884368418.

Almost surely, 2^47537473666 is an apocalyptic number.

47537473666 is a deficient number, since it is larger than the sum of its proper divisors (23768736836).

47537473666 is a wasteful number, since it uses less digits than its factorization.

47537473666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23768736835.

The product of its digits is 53343360, while the sum is 58.

The spelling of 47537473666 in words is "forty-seven billion, five hundred thirty-seven million, four hundred seventy-three thousand, six hundred sixty-six".