66605330 has 16 divisors (see below), whose sum is σ = 130788864. Its totient is φ = 24220080.

The previous prime is 66605327. The next prime is 66605333. The reversal of 66605330 is 3350666.

It is an interprime number because it is at equal distance from previous prime (66605327) and next prime (66605333).

It is a junction number, because it is equal to n+sod(n) for n = 66605293 and 66605302.

It is not an unprimeable number, because it can be changed into a prime (66605333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302642 + ... + 302861.

It is an arithmetic number, because the mean of its divisors is an integer number (8174304).

Almost surely, 2^66605330 is an apocalyptic number.

66605330 is a deficient number, since it is larger than the sum of its proper divisors (64183534).

66605330 is a wasteful number, since it uses less digits than its factorization.

66605330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605521.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 66605330 is about 8161.2088565359. The cubic root of 66605330 is about 405.3557408826.

Adding to 66605330 its reverse (3350666), we get a palindrome (69955996).

The spelling of 66605330 in words is "sixty-six million, six hundred five thousand, three hundred thirty".