660606366 has 64 divisors (see below), whose sum is σ = 1602104832. Its totient is φ = 177272832.

The previous prime is 660606361. The next prime is 660606367. The reversal of 660606366 is 663606066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660606361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 675670 + ... + 676646.

It is an arithmetic number, because the mean of its divisors is an integer number (25032888).

Almost surely, 2^660606366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660606366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801052416).

660606366 is an abundant number, since it is smaller than the sum of its proper divisors (941498466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660606366 is a wasteful number, since it uses less digits than its factorization.

660606366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953.

The product of its (nonzero) digits is 139968, while the sum is 39.

The square root of 660606366 is about 25702.2638302543. The cubic root of 660606366 is about 870.9253227937.

The spelling of 660606366 in words is "six hundred sixty million, six hundred six thousand, three hundred sixty-six".