667537063 has 2 divisors, whose sum is σ = 667537064. Its totient is φ = 667537062.

The previous prime is 667537049. The next prime is 667537163. The reversal of 667537063 is 360735766.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667537063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667537163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333768531 + 333768532.

It is an arithmetic number, because the mean of its divisors is an integer number (333768532).

Almost surely, 2^667537063 is an apocalyptic number.

667537063 is a deficient number, since it is larger than the sum of its proper divisors (1).

667537063 is an equidigital number, since it uses as much as digits as its factorization.

667537063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 43.

The square root of 667537063 is about 25836.7386293239. The cubic root of 667537063 is about 873.9604800190.

The spelling of 667537063 in words is "six hundred sixty-seven million, five hundred thirty-seven thousand, sixty-three".