66722411 has 4 divisors (see below), whose sum is σ = 76254192. Its totient is φ = 57190632.

The previous prime is 66722407. The next prime is 66722413. The reversal of 66722411 is 11422766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66722411 - 2² = 66722407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66722413) 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, 4765880 + ... + 4765893.

It is an arithmetic number, because the mean of its divisors is an integer number (19063548).

Almost surely, 2^66722411 is an apocalyptic number.

66722411 is a deficient number, since it is larger than the sum of its proper divisors (9531781).

66722411 is an equidigital number, since it uses as much as digits as its factorization.

66722411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9531780.

The product of its digits is 4032, while the sum is 29.

The square root of 66722411 is about 8168.3787253041. The cubic root of 66722411 is about 405.5931176513.

The spelling of 66722411 in words is "sixty-six million, seven hundred twenty-two thousand, four hundred eleven".