660348061 has 2 divisors, whose sum is σ = 660348062. Its totient is φ = 660348060.

The previous prime is 660348053. The next prime is 660348077. The reversal of 660348061 is 160843066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586559961 + 73788100 = 24219^2 + 8590^2 .

It is a cyclic number.

It is not a de Polignac number, because 660348061 - 2³ = 660348053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660348011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330174030 + 330174031.

It is an arithmetic number, because the mean of its divisors is an integer number (330174031).

Almost surely, 2^660348061 is an apocalyptic number.

It is an amenable number.

660348061 is a deficient number, since it is larger than the sum of its proper divisors (1).

660348061 is an equidigital number, since it uses as much as digits as its factorization.

660348061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 660348061 is about 25697.2383924810. The cubic root of 660348061 is about 870.8117939184.

The spelling of 660348061 in words is "six hundred sixty million, three hundred forty-eight thousand, sixty-one".