66725122 has 8 divisors (see below), whose sum is σ = 102528972. Its totient is φ = 32548800.

The previous prime is 66725117. The next prime is 66725123. The reversal of 66725122 is 22152766.

It can be written as a sum of positive squares in 2 ways, for example, as 66601921 + 123201 = 8161^2 + 351^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66725123) 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, 406779 + ... + 406942.

Almost surely, 2^66725122 is an apocalyptic number.

66725122 is a deficient number, since it is larger than the sum of its proper divisors (35803850).

66725122 is a wasteful number, since it uses less digits than its factorization.

66725122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813764.

The product of its digits is 10080, while the sum is 31.

The square root of 66725122 is about 8168.5446684217. The cubic root of 66725122 is about 405.5986107984.

Adding to 66725122 its reverse (22152766), we get a palindrome (88877888).

The spelling of 66725122 in words is "sixty-six million, seven hundred twenty-five thousand, one hundred twenty-two".