660911101 has 2 divisors, whose sum is σ = 660911102. Its totient is φ = 660911100.

The previous prime is 660911099. The next prime is 660911107. The reversal of 660911101 is 101119066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628705476 + 32205625 = 25074^2 + 5675^2 .

It is a cyclic number.

It is not a de Polignac number, because 660911101 - 2¹ = 660911099 is a prime.

Together with 660911099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660911107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330455550 + 330455551.

It is an arithmetic number, because the mean of its divisors is an integer number (330455551).

Almost surely, 2^660911101 is an apocalyptic number.

It is an amenable number.

660911101 is a deficient number, since it is larger than the sum of its proper divisors (1).

660911101 is an equidigital number, since it uses as much as digits as its factorization.

660911101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 660911101 is about 25708.1913210556. The cubic root of 660911101 is about 871.0592202969.

The spelling of 660911101 in words is "six hundred sixty million, nine hundred eleven thousand, one hundred one".