668047738845 has 16 divisors (see below), whose sum is σ = 1068929883072. Its totient is φ = 356274293760.

The previous prime is 668047738843. The next prime is 668047738847. The reversal of 668047738845 is 548837740866.

It is an interprime number because it is at equal distance from previous prime (668047738843) and next prime (668047738847).

It is not a de Polignac number, because 668047738845 - 2¹ = 668047738843 is a prime.

It is a super-4 number, since 4×668047738845⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668047738843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802107 + ... + 1406936.

It is an arithmetic number, because the mean of its divisors is an integer number (66808117692).

Almost surely, 2^668047738845 is an apocalyptic number.

It is an amenable number.

668047738845 is a deficient number, since it is larger than the sum of its proper divisors (400882144227).

668047738845 is a wasteful number, since it uses less digits than its factorization.

668047738845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229212.

The product of its (nonzero) digits is 216760320, while the sum is 66.

The spelling of 668047738845 in words is "six hundred sixty-eight billion, forty-seven million, seven hundred thirty-eight thousand, eight hundred forty-five".