668036222498 has 18 divisors (see below), whose sum is σ = 1004722843761. Its totient is φ = 333130968744.

The previous prime is 668036222459. The next prime is 668036222507. The reversal of 668036222498 is 894222630866.

It can be written as a sum of positive squares in 2 ways, for example, as 577337069929 + 90699152569 = 759827^2 + 301163^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=577943.

It is a super-2 number, since 2×668036222498² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 761728436 + ... + 761729312.

Almost surely, 2^668036222498 is an apocalyptic number.

668036222498 is a deficient number, since it is larger than the sum of its proper divisors (336686621263).

668036222498 is an frugal number, since it uses more digits than its factorization.

668036222498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074 (or 1538 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 668036222498 in words is "six hundred sixty-eight billion, thirty-six million, two hundred twenty-two thousand, four hundred ninety-eight".