66060071721700 has 72 divisors (see below), whose sum is σ = 163939451772992. Its totient is φ = 22633894558080.

The previous prime is 66060071721661. The next prime is 66060071721701. The reversal of 66060071721700 is 712717006066.

It is a super-2 number, since 2×66060071721700² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66060071721701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30779679 + ... + 32855878.

Almost surely, 2^{66060071721700} is an apocalyptic number.

It is an amenable number.

66060071721700 is an abundant number, since it is smaller than the sum of its proper divisors (97879380051292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66060071721700 is a wasteful number, since it uses less digits than its factorization.

66060071721700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63637061 (or 63637054 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 43.

Adding to 66060071721700 its reverse (712717006066), we get a palindrome (66772788727766).

The spelling of 66060071721700 in words is "sixty-six trillion, sixty billion, seventy-one million, seven hundred twenty-one thousand, seven hundred".