66133277421 has 4 divisors (see below), whose sum is σ = 88177703232. Its totient is φ = 44088851612.

The previous prime is 66133277377. The next prime is 66133277473. The reversal of 66133277421 is 12477233166.

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 66133277421 - 2⁷ = 66133277293 is a prime.

It is a super-2 number, since 2×66133277421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66133277521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11022212901 + ... + 11022212906.

It is an arithmetic number, because the mean of its divisors is an integer number (22044425808).

Almost surely, 2^66133277421 is an apocalyptic number.

It is an amenable number.

66133277421 is a deficient number, since it is larger than the sum of its proper divisors (22044425811).

66133277421 is a wasteful number, since it uses less digits than its factorization.

66133277421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22044425810.

The product of its digits is 254016, while the sum is 42.

The spelling of 66133277421 in words is "sixty-six billion, one hundred thirty-three million, two hundred seventy-seven thousand, four hundred twenty-one".