66611344 has 20 divisors (see below), whose sum is σ = 129930300. Its totient is φ = 33080960.

The previous prime is 66611341. The next prime is 66611351. The reversal of 66611344 is 44311666.

It can be written as a sum of positive squares in 2 ways, for example, as 18835600 + 47775744 = 4340^2 + 6912^2 .

It is a super-2 number, since 2×66611344² = 8874142298972672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66611341) 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, 11587 + ... + 16354.

It is an arithmetic number, because the mean of its divisors is an integer number (6496515).

Almost surely, 2^66611344 is an apocalyptic number.

It is an amenable number.

66611344 is a deficient number, since it is larger than the sum of its proper divisors (63318956).

66611344 is a wasteful number, since it uses less digits than its factorization.

66611344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28098 (or 28092 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 66611344 is about 8161.5772985373. The cubic root of 66611344 is about 405.3679407874.

The spelling of 66611344 in words is "sixty-six million, six hundred eleven thousand, three hundred forty-four".