17666668472 has 8 divisors (see below), whose sum is σ = 33125003400. Its totient is φ = 8833334232.

The previous prime is 17666668471. The next prime is 17666668489. The reversal of 17666668472 is 27486666671.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×17666668472² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17666668471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104166772 + ... + 1104166787.

It is an arithmetic number, because the mean of its divisors is an integer number (4140625425).

Almost surely, 2^17666668472 is an apocalyptic number.

It is an amenable number.

17666668472 is a deficient number, since it is larger than the sum of its proper divisors (15458334928).

17666668472 is a wasteful number, since it uses less digits than its factorization.

17666668472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208333565 (or 2208333561 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 59.

The spelling of 17666668472 in words is "seventeen billion, six hundred sixty-six million, six hundred sixty-eight thousand, four hundred seventy-two".