660566611 has 8 divisors (see below), whose sum is σ = 685140480. Its totient is φ = 636112512.

The previous prime is 660566593. The next prime is 660566653. The reversal of 660566611 is 116665066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660566611 - 2⁵ = 660566579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660560611) 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, 18630 + ... + 40843.

It is an arithmetic number, because the mean of its divisors is an integer number (85642560).

Almost surely, 2^660566611 is an apocalyptic number.

660566611 is a deficient number, since it is larger than the sum of its proper divisors (24573869).

660566611 is a wasteful number, since it uses less digits than its factorization.

660566611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59885.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 660566611 is about 25701.4904431630. The cubic root of 660566611 is about 870.9078518092.

The spelling of 660566611 in words is "six hundred sixty million, five hundred sixty-six thousand, six hundred eleven".