666277496701 has 2 divisors, whose sum is σ = 666277496702. Its totient is φ = 666277496700.

The previous prime is 666277496593. The next prime is 666277496761. The reversal of 666277496701 is 107694772666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420954416100 + 245323080601 = 648810^2 + 495301^2 .

It is a cyclic number.

It is not a de Polignac number, because 666277496701 - 2¹¹ = 666277494653 is a prime.

It is a super-3 number, since 3×666277496701³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 666277496701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666277496761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333138748350 + 333138748351.

It is an arithmetic number, because the mean of its divisors is an integer number (333138748351).

Almost surely, 2^666277496701 is an apocalyptic number.

It is an amenable number.

666277496701 is a deficient number, since it is larger than the sum of its proper divisors (1).

666277496701 is an equidigital number, since it uses as much as digits as its factorization.

666277496701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 61.

The spelling of 666277496701 in words is "six hundred sixty-six billion, two hundred seventy-seven million, four hundred ninety-six thousand, seven hundred one".