660060061 has 2 divisors, whose sum is σ = 660060062. Its totient is φ = 660060060.

The previous prime is 660060053. The next prime is 660060103. The reversal of 660060061 is 160060066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591997561 + 68062500 = 24331^2 + 8250^2 .

It is a cyclic number.

It is not a de Polignac number, because 660060061 - 2³ = 660060053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660060001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330030030 + 330030031.

It is an arithmetic number, because the mean of its divisors is an integer number (330030031).

Almost surely, 2^660060061 is an apocalyptic number.

It is an amenable number.

660060061 is a deficient number, since it is larger than the sum of its proper divisors (1).

660060061 is an equidigital number, since it uses as much as digits as its factorization.

660060061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 660060061 is about 25691.6340663649. The cubic root of 660060061 is about 870.6851787387.

The spelling of 660060061 in words is "six hundred sixty million, sixty thousand, sixty-one".