240626660221 has 4 divisors (see below), whose sum is σ = 241541590752. Its totient is φ = 239711729692.

The previous prime is 240626660207. The next prime is 240626660237. The reversal of 240626660221 is 122066626042.

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 240626660221 - 2⁷ = 240626660093 is a prime.

It is a super-2 number, since 2×240626660221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240626660291) 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, 457464871 + ... + 457465396.

It is an arithmetic number, because the mean of its divisors is an integer number (60385397688).

Almost surely, 2^240626660221 is an apocalyptic number.

It is an amenable number.

240626660221 is a deficient number, since it is larger than the sum of its proper divisors (914930531).

240626660221 is an equidigital number, since it uses as much as digits as its factorization.

240626660221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914930530.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 240626660221 in words is "two hundred forty billion, six hundred twenty-six million, six hundred sixty thousand, two hundred twenty-one".