667072772273 has 2 divisors, whose sum is σ = 667072772274. Its totient is φ = 667072772272.

The previous prime is 667072772227. The next prime is 667072772287. The reversal of 667072772273 is 372277270766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344747471104 + 322325301169 = 587152^2 + 567737^2 .

It is a cyclic number.

It is not a de Polignac number, because 667072772273 - 2¹⁰ = 667072771249 is a prime.

It is not a weakly prime, because it can be changed into another prime (667072772473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333536386136 + 333536386137.

It is an arithmetic number, because the mean of its divisors is an integer number (333536386137).

Almost surely, 2^667072772273 is an apocalyptic number.

It is an amenable number.

667072772273 is a deficient number, since it is larger than the sum of its proper divisors (1).

667072772273 is an equidigital number, since it uses as much as digits as its factorization.

667072772273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14521248, while the sum is 56.

The spelling of 667072772273 in words is "six hundred sixty-seven billion, seventy-two million, seven hundred seventy-two thousand, two hundred seventy-three".