2172666142 has 8 divisors (see below), whose sum is σ = 3287840256. Its totient is φ = 1076719392.

The previous prime is 2172666127. The next prime is 2172666143. The reversal of 2172666142 is 2416662712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172666143) 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, 4806558 + ... + 4807009.

It is an arithmetic number, because the mean of its divisors is an integer number (410980032).

Almost surely, 2^2172666142 is an apocalyptic number.

2172666142 is a deficient number, since it is larger than the sum of its proper divisors (1115174114).

2172666142 is a wasteful number, since it uses less digits than its factorization.

2172666142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613682.

The product of its digits is 48384, while the sum is 37.

The square root of 2172666142 is about 46611.8669653984. The cubic root of 2172666142 is about 1295.1825926800.

The spelling of 2172666142 in words is "two billion, one hundred seventy-two million, six hundred sixty-six thousand, one hundred forty-two".