20160172066 has 8 divisors (see below), whose sum is σ = 30241382400. Its totient is φ = 10079711268.

The previous prime is 20160172009. The next prime is 20160172069. The reversal of 20160172066 is 66027106102.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20160172069) 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, 114466 + ... + 231133.

It is an arithmetic number, because the mean of its divisors is an integer number (3780172800).

Almost surely, 2^20160172066 is an apocalyptic number.

20160172066 is a deficient number, since it is larger than the sum of its proper divisors (10081210334).

20160172066 is a wasteful number, since it uses less digits than its factorization.

20160172066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374768.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 20160172066 its reverse (66027106102), we get a palindrome (86187278168).

The spelling of 20160172066 in words is "twenty billion, one hundred sixty million, one hundred seventy-two thousand, sixty-six".