660234077 has 2 divisors, whose sum is σ = 660234078. Its totient is φ = 660234076.

The previous prime is 660234073. The next prime is 660234079. The reversal of 660234077 is 770432066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660181636 + 52441 = 25694^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 660234077 - 2² = 660234073 is a prime.

Together with 660234079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660234073) 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, 330117038 + 330117039.

It is an arithmetic number, because the mean of its divisors is an integer number (330117039).

Almost surely, 2^660234077 is an apocalyptic number.

It is an amenable number.

660234077 is a deficient number, since it is larger than the sum of its proper divisors (1).

660234077 is an equidigital number, since it uses as much as digits as its factorization.

660234077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 660234077 is about 25695.0204709006. The cubic root of 660234077 is about 870.7616868466.

The spelling of 660234077 in words is "six hundred sixty million, two hundred thirty-four thousand, seventy-seven".