671225201761 has 2 divisors, whose sum is σ = 671225201762. Its totient is φ = 671225201760.

The previous prime is 671225201747. The next prime is 671225201807. The reversal of 671225201761 is 167102522176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513422406225 + 157802795536 = 716535^2 + 397244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671225201761 is a prime.

It is a super-2 number, since 2×671225201761² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671225201461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335612600880 + 335612600881.

It is an arithmetic number, because the mean of its divisors is an integer number (335612600881).

Almost surely, 2^671225201761 is an apocalyptic number.

It is an amenable number.

671225201761 is a deficient number, since it is larger than the sum of its proper divisors (1).

671225201761 is an equidigital number, since it uses as much as digits as its factorization.

671225201761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 671225201761 in words is "six hundred seventy-one billion, two hundred twenty-five million, two hundred one thousand, seven hundred sixty-one".