66621276911 has 8 divisors (see below), whose sum is σ = 79448976384. Its totient is φ = 54621171000.

The previous prime is 66621276907. The next prime is 66621276923. The reversal of 66621276911 is 11967212666.

66621276911 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 66621276911 - 2² = 66621276907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66621276901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206898215 + ... + 206898536.

It is an arithmetic number, because the mean of its divisors is an integer number (9931122048).

Almost surely, 2^66621276911 is an apocalyptic number.

66621276911 is a deficient number, since it is larger than the sum of its proper divisors (12827699473).

66621276911 is a wasteful number, since it uses less digits than its factorization.

66621276911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413796781.

The product of its digits is 326592, while the sum is 47.

The spelling of 66621276911 in words is "sixty-six billion, six hundred twenty-one million, two hundred seventy-six thousand, nine hundred eleven".