66114074681 has 4 divisors (see below), whose sum is σ = 66216896592. Its totient is φ = 66011252772.

The previous prime is 66114074657. The next prime is 66114074693. The reversal of 66114074681 is 18647041166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66114074681 - 2¹⁰ = 66114073657 is a prime.

It is a super-2 number, since 2×66114074681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66114074381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51409991 + ... + 51411276.

It is an arithmetic number, because the mean of its divisors is an integer number (16554224148).

Almost surely, 2^66114074681 is an apocalyptic number.

It is an amenable number.

66114074681 is a deficient number, since it is larger than the sum of its proper divisors (102821911).

66114074681 is a wasteful number, since it uses less digits than its factorization.

66114074681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102821910.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 66114074681 in words is "sixty-six billion, one hundred fourteen million, seventy-four thousand, six hundred eighty-one".