660511061 has 8 divisors (see below), whose sum is σ = 755052480. Its totient is φ = 566015328.

The previous prime is 660511051. The next prime is 660511063. The reversal of 660511061 is 160115066.

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 660511061 - 2⁶ = 660510997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660511061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660511063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29210 + ... + 46628.

It is an arithmetic number, because the mean of its divisors is an integer number (94381560).

Almost surely, 2^660511061 is an apocalyptic number.

It is an amenable number.

660511061 is a deficient number, since it is larger than the sum of its proper divisors (94541419).

660511061 is a wasteful number, since it uses less digits than its factorization.

660511061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22843.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 660511061 is about 25700.4097438154. The cubic root of 660511061 is about 870.8834382796.

The spelling of 660511061 in words is "six hundred sixty million, five hundred eleven thousand, sixty-one".