660576061 has 2 divisors, whose sum is σ = 660576062. Its totient is φ = 660576060.

The previous prime is 660576041. The next prime is 660576083. The reversal of 660576061 is 160675066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391287961 + 269288100 = 19781^2 + 16410^2 .

It is a cyclic number.

It is not a de Polignac number, because 660576061 - 2²⁷ = 526358333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660576061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660576011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330288030 + 330288031.

It is an arithmetic number, because the mean of its divisors is an integer number (330288031).

Almost surely, 2^660576061 is an apocalyptic number.

It is an amenable number.

660576061 is a deficient number, since it is larger than the sum of its proper divisors (1).

660576061 is an equidigital number, since it uses as much as digits as its factorization.

660576061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 660576061 is about 25701.6742839839. The cubic root of 660576061 is about 870.9120048296.

The spelling of 660576061 in words is "six hundred sixty million, five hundred seventy-six thousand, sixty-one".