66121057202 has 16 divisors (see below), whose sum is σ = 103565259072. Its totient is φ = 31601288400.

The previous prime is 66121057193. The next prime is 66121057229. The reversal of 66121057202 is 20275012166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428573 + ... + 562064.

It is an arithmetic number, because the mean of its divisors is an integer number (6472828692).

Almost surely, 2^66121057202 is an apocalyptic number.

66121057202 is a deficient number, since it is larger than the sum of its proper divisors (37444201870).

66121057202 is a wasteful number, since it uses less digits than its factorization.

66121057202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992113.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 66121057202 its reverse (20275012166), we get a palindrome (86396069368).

The spelling of 66121057202 in words is "sixty-six billion, one hundred twenty-one million, fifty-seven thousand, two hundred two".