680654141221 has 4 divisors (see below), whose sum is σ = 680674296672. Its totient is φ = 680633985772.

The previous prime is 680654141201. The next prime is 680654141239. The reversal of 680654141221 is 122141456086.

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 680654141221 - 2¹¹ = 680654139173 is a prime.

It is a super-2 number, since 2×680654141221² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680654141201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10026985 + ... + 10094638.

It is an arithmetic number, because the mean of its divisors is an integer number (170168574168).

Almost surely, 2^680654141221 is an apocalyptic number.

It is an amenable number.

680654141221 is a deficient number, since it is larger than the sum of its proper divisors (20155451).

680654141221 is a wasteful number, since it uses less digits than its factorization.

680654141221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20155450.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 680654141221 in words is "six hundred eighty billion, six hundred fifty-four million, one hundred forty-one thousand, two hundred twenty-one".