667606633255531 has 2 divisors, whose sum is σ = 667606633255532. Its totient is φ = 667606633255530.

The previous prime is 667606633255469. The next prime is 667606633255547. The reversal of 667606633255531 is 135552336606766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667606633255531 - 2²⁵ = 667606599701099 is a prime.

It is a super-2 number, since 2×667606633255531² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667606633255561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333803316627765 + 333803316627766.

It is an arithmetic number, because the mean of its divisors is an integer number (333803316627766).

Almost surely, 2^{667606633255531} is an apocalyptic number.

667606633255531 is a deficient number, since it is larger than the sum of its proper divisors (1).

667606633255531 is an equidigital number, since it uses as much as digits as its factorization.

667606633255531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416000, while the sum is 64.

The spelling of 667606633255531 in words is "six hundred sixty-seven trillion, six hundred six billion, six hundred thirty-three million, two hundred fifty-five thousand, five hundred thirty-one".