667105511663 has 2 divisors, whose sum is σ = 667105511664. Its totient is φ = 667105511662.

The previous prime is 667105511659. The next prime is 667105511749. The reversal of 667105511663 is 366115501766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667105511663 - 2² = 667105511659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667105811663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333552755831 + 333552755832.

It is an arithmetic number, because the mean of its divisors is an integer number (333552755832).

Almost surely, 2^667105511663 is an apocalyptic number.

667105511663 is a deficient number, since it is larger than the sum of its proper divisors (1).

667105511663 is an equidigital number, since it uses as much as digits as its factorization.

667105511663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 667105511663 in words is "six hundred sixty-seven billion, one hundred five million, five hundred eleven thousand, six hundred sixty-three".