6668620541 has 8 divisors (see below), whose sum is σ = 7306909344. Its totient is φ = 6035673520.

The previous prime is 6668620523. The next prime is 6668620547. The reversal of 6668620541 is 1450268666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6668620541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6668620492 and 6668620501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668620547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332830 + ... + 1337823.

It is an arithmetic number, because the mean of its divisors is an integer number (913363668).

Almost surely, 2^6668620541 is an apocalyptic number.

It is an amenable number.

6668620541 is a deficient number, since it is larger than the sum of its proper divisors (638288803).

6668620541 is a wasteful number, since it uses less digits than its factorization.

6668620541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670891.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 6668620541 is about 81661.6222040684. The cubic root of 6668620541 is about 1882.2559064167.

The spelling of 6668620541 in words is "six billion, six hundred sixty-eight million, six hundred twenty thousand, five hundred forty-one".