667181460493 has 2 divisors, whose sum is σ = 667181460494. Its totient is φ = 667181460492.

The previous prime is 667181460461. The next prime is 667181460581. The reversal of 667181460493 is 394064181766.

667181460493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354670273764 + 312511186729 = 595542^2 + 559027^2 .

It is a cyclic number.

It is not a de Polignac number, because 667181460493 - 2⁵ = 667181460461 is a prime.

It is a super-2 number, since 2×667181460493² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667181463493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333590730246 + 333590730247.

It is an arithmetic number, because the mean of its divisors is an integer number (333590730247).

Almost surely, 2^667181460493 is an apocalyptic number.

It is an amenable number.

667181460493 is a deficient number, since it is larger than the sum of its proper divisors (1).

667181460493 is an equidigital number, since it uses as much as digits as its factorization.

667181460493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 667181460493 in words is "six hundred sixty-seven billion, one hundred eighty-one million, four hundred sixty thousand, four hundred ninety-three".