668701840241 has 4 divisors (see below), whose sum is σ = 684253045872. Its totient is φ = 653150634612.

The previous prime is 668701840237. The next prime is 668701840249. The reversal of 668701840241 is 142048107866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 668701840241 - 2² = 668701840237 is a prime.

It is a super-2 number, since 2×668701840241² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668701840249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7775602751 + ... + 7775602836.

It is an arithmetic number, because the mean of its divisors is an integer number (171063261468).

Almost surely, 2^668701840241 is an apocalyptic number.

It is an amenable number.

668701840241 is a deficient number, since it is larger than the sum of its proper divisors (15551205631).

668701840241 is a wasteful number, since it uses less digits than its factorization.

668701840241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15551205630.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 668701840241 in words is "six hundred sixty-eight billion, seven hundred one million, eight hundred forty thousand, two hundred forty-one".