667233061091 has 2 divisors, whose sum is σ = 667233061092. Its totient is φ = 667233061090.

The previous prime is 667233061073. The next prime is 667233061129. The reversal of 667233061091 is 190160332766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667233061091 is a prime.

It is a super-2 number, since 2×667233061091² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (667232061091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333616530545 + 333616530546.

It is an arithmetic number, because the mean of its divisors is an integer number (333616530546).

Almost surely, 2^667233061091 is an apocalyptic number.

667233061091 is a deficient number, since it is larger than the sum of its proper divisors (1).

667233061091 is an equidigital number, since it uses as much as digits as its factorization.

667233061091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 44.

The spelling of 667233061091 in words is "six hundred sixty-seven billion, two hundred thirty-three million, sixty-one thousand, ninety-one".