66611630 has 16 divisors (see below), whose sum is σ = 120126240. Its totient is φ = 26594592.

The previous prime is 66611617. The next prime is 66611639. The reversal of 66611630 is 3611666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66611593 and 66611602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66611639) 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, 410 + ... + 11549.

It is an arithmetic number, because the mean of its divisors is an integer number (7507890).

Almost surely, 2^66611630 is an apocalyptic number.

66611630 is a deficient number, since it is larger than the sum of its proper divisors (53514610).

66611630 is a wasteful number, since it uses less digits than its factorization.

66611630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12523.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66611630 is about 8161.5948196416. The cubic root of 66611630 is about 405.3685209442.

The spelling of 66611630 in words is "sixty-six million, six hundred eleven thousand, six hundred thirty".