260720077 has 2 divisors, whose sum is σ = 260720078. Its totient is φ = 260720076.

The previous prime is 260720059. The next prime is 260720099. The reversal of 260720077 is 770027062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201952521 + 58767556 = 14211^2 + 7666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260720077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260720017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130360038 + 130360039.

It is an arithmetic number, because the mean of its divisors is an integer number (130360039).

Almost surely, 2^260720077 is an apocalyptic number.

It is an amenable number.

260720077 is a deficient number, since it is larger than the sum of its proper divisors (1).

260720077 is an equidigital number, since it uses as much as digits as its factorization.

260720077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 260720077 is about 16146.8286979208. The cubic root of 260720077 is about 638.8391040201.

The spelling of 260720077 in words is "two hundred sixty million, seven hundred twenty thousand, seventy-seven".