66311157066121 has 8 divisors (see below), whose sum is σ = 72663836200704. Its totient is φ = 60012543286320.

The previous prime is 66311157066107. The next prime is 66311157066139. The reversal of 66311157066121 is 12166075111366.

It is a happy number.

66311157066121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 66311157066121 - 2²³ = 66311148677513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66311157066421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13516336126 + ... + 13516341031.

It is an arithmetic number, because the mean of its divisors is an integer number (9082979525088).

Almost surely, 2^{66311157066121} is an apocalyptic number.

It is an amenable number.

66311157066121 is a deficient number, since it is larger than the sum of its proper divisors (6352679134583).

66311157066121 is a wasteful number, since it uses less digits than its factorization.

66311157066121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27032677391.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 66311157066121 in words is "sixty-six trillion, three hundred eleven billion, one hundred fifty-seven million, sixty-six thousand, one hundred twenty-one".