66570012111 has 16 divisors (see below), whose sum is σ = 92333692800. Its totient is φ = 42610269408.

The previous prime is 66570012107. The next prime is 66570012143. The reversal of 66570012111 is 11121007566.

It is not a de Polignac number, because 66570012111 - 2² = 66570012107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66570012101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2121781 + ... + 2152926.

It is an arithmetic number, because the mean of its divisors is an integer number (5770855800).

Almost surely, 2^66570012111 is an apocalyptic number.

66570012111 is a deficient number, since it is larger than the sum of its proper divisors (25763680689).

66570012111 is a wasteful number, since it uses less digits than its factorization.

66570012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274918.

The product of its (nonzero) digits is 2520, while the sum is 30.

Adding to 66570012111 its reverse (11121007566), we get a palindrome (77691019677).

The spelling of 66570012111 in words is "sixty-six billion, five hundred seventy million, twelve thousand, one hundred eleven".