47231666 has 4 divisors (see below), whose sum is σ = 70847502. Its totient is φ = 23615832.

The previous prime is 47231641. The next prime is 47231687. The reversal of 47231666 is 66613274.

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., 47210641 + 21025 = 6871^2 + 145^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11807915 + ... + 11807918.

Almost surely, 2^47231666 is an apocalyptic number.

47231666 is a deficient number, since it is larger than the sum of its proper divisors (23615836).

47231666 is a wasteful number, since it uses less digits than its factorization.

47231666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23615835.

The product of its digits is 36288, while the sum is 35.

The square root of 47231666 is about 6872.5298107757. The cubic root of 47231666 is about 361.4745742668.

The spelling of 47231666 in words is "forty-seven million, two hundred thirty-one thousand, six hundred sixty-six".