66661030 has 16 divisors (see below), whose sum is σ = 120936960. Its totient is φ = 26453952.

The previous prime is 66661009. The next prime is 66661043. The reversal of 66661030 is 3016666.

It is a self number, because there is not a number n which added to its sum of digits gives 66661030.

It is a congruent number.

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, 24975 + ... + 27514.

It is an arithmetic number, because the mean of its divisors is an integer number (7558560).

Almost surely, 2^66661030 is an apocalyptic number.

66661030 is a deficient number, since it is larger than the sum of its proper divisors (54275930).

66661030 is a wasteful number, since it uses less digits than its factorization.

66661030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52623.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 66661030 is about 8164.6206280513. The cubic root of 66661030 is about 405.4687049344.

Adding to 66661030 its reverse (3016666), we get a palindrome (69677696).

The spelling of 66661030 in words is "sixty-six million, six hundred sixty-one thousand, thirty".