66251122 has 16 divisors (see below), whose sum is σ = 114212160. Its totient is φ = 28233648.

The previous prime is 66251117. The next prime is 66251137. The reversal of 66251122 is 22115266.

It is a super-2 number, since 2×66251122² = 8778422332517768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10713 + ... + 15724.

It is an arithmetic number, because the mean of its divisors is an integer number (7138260).

Almost surely, 2^66251122 is an apocalyptic number.

66251122 is a deficient number, since it is larger than the sum of its proper divisors (47961038).

66251122 is a wasteful number, since it uses less digits than its factorization.

66251122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26625.

The product of its digits is 1440, while the sum is 25.

The square root of 66251122 is about 8139.4792216701. The cubic root of 66251122 is about 404.6359009867.

Adding to 66251122 its reverse (22115266), we get a palindrome (88366388).

The spelling of 66251122 in words is "sixty-six million, two hundred fifty-one thousand, one hundred twenty-two".