667077121 has 2 divisors, whose sum is σ = 667077122. Its totient is φ = 667077120.

The previous prime is 667077113. The next prime is 667077149. The reversal of 667077121 is 121770766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549246096 + 117831025 = 23436^2 + 10855^2 .

It is a cyclic number.

It is not a de Polignac number, because 667077121 - 2³ = 667077113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667071121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333538560 + 333538561.

It is an arithmetic number, because the mean of its divisors is an integer number (333538561).

Almost surely, 2^667077121 is an apocalyptic number.

It is an amenable number.

667077121 is a deficient number, since it is larger than the sum of its proper divisors (1).

667077121 is an equidigital number, since it uses as much as digits as its factorization.

667077121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 667077121 is about 25827.8361656566. The cubic root of 667077121 is about 873.7597103989.

The spelling of 667077121 in words is "six hundred sixty-seven million, seventy-seven thousand, one hundred twenty-one".