2917172666 has 8 divisors (see below), whose sum is σ = 4400205120. Its totient is φ = 1450437628.

The previous prime is 2917172663. The next prime is 2917172711. The reversal of 2917172666 is 6662717192.

2917172666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2917172666.

It is not an unprimeable number, because it can be changed into a prime (2917172663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4073906 + ... + 4074621.

It is an arithmetic number, because the mean of its divisors is an integer number (550025640).

Almost surely, 2^2917172666 is an apocalyptic number.

2917172666 is a deficient number, since it is larger than the sum of its proper divisors (1483032454).

2917172666 is a wasteful number, since it uses less digits than its factorization.

2917172666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8148708.

The product of its digits is 381024, while the sum is 47.

The square root of 2917172666 is about 54010.8569271031. The cubic root of 2917172666 is about 1428.8524325497.

The spelling of 2917172666 in words is "two billion, nine hundred seventeen million, one hundred seventy-two thousand, six hundred sixty-six".