66922241 has 4 divisors (see below), whose sum is σ = 67046484. Its totient is φ = 66798000.

The previous prime is 66922231. The next prime is 66922253. The reversal of 66922241 is 14222966.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16810000 + 50112241 = 4100^2 + 7079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66922241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66922198 and 66922207.

It is not an unprimeable number, because it can be changed into a prime (66922201) 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, 61310 + ... + 62391.

It is an arithmetic number, because the mean of its divisors is an integer number (16761621).

Almost surely, 2^66922241 is an apocalyptic number.

It is an amenable number.

66922241 is a deficient number, since it is larger than the sum of its proper divisors (124243).

66922241 is a wasteful number, since it uses less digits than its factorization.

66922241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124242.

The product of its digits is 10368, while the sum is 32.

The square root of 66922241 is about 8180.6015060019. The cubic root of 66922241 is about 405.9976238870.

The spelling of 66922241 in words is "sixty-six million, nine hundred twenty-two thousand, two hundred forty-one".