3231712117666 has 4 divisors (see below), whose sum is σ = 4847568176502. Its totient is φ = 1615856058832.

The previous prime is 3231712117561. The next prime is 3231712117679. The reversal of 3231712117666 is 6667112171323.

It is a happy number.

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., 2372151352041 + 859560765625 = 1540179^2 + 927125^2 .

It is a super-2 number, since 2×3231712117666² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807928029415 + ... + 807928029418.

Almost surely, 2^{3231712117666} is an apocalyptic number.

3231712117666 is a deficient number, since it is larger than the sum of its proper divisors (1615856058836).

3231712117666 is a wasteful number, since it uses less digits than its factorization.

3231712117666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615856058835.

The product of its digits is 381024, while the sum is 46.

Adding to 3231712117666 its reverse (6667112171323), we get a palindrome (9898824288989).

The spelling of 3231712117666 in words is "three trillion, two hundred thirty-one billion, seven hundred twelve million, one hundred seventeen thousand, six hundred sixty-six".