6660430270642 has 8 divisors (see below), whose sum is σ = 9997736003100. Its totient is φ = 3327851602944.

The previous prime is 6660430270639. The next prime is 6660430270649. The reversal of 6660430270642 is 2460720340666.

It can be written as a sum of positive squares in 2 ways, for example, as 4921515965601 + 1738914305041 = 2218449^2 + 1318679^2 .

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

It is a super-2 number, since 2×6660430270642² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6660430270592 and 6660430270601.

It is not an unprimeable number, because it can be changed into a prime (6660430270649) 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, 1181762667 + ... + 1181768302.

Almost surely, 2^{6660430270642} is an apocalyptic number.

6660430270642 is a deficient number, since it is larger than the sum of its proper divisors (3337305732458).

6660430270642 is a wasteful number, since it uses less digits than its factorization.

6660430270642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363532380.

The product of its (nonzero) digits is 1741824, while the sum is 46.

The spelling of 6660430270642 in words is "six trillion, six hundred sixty billion, four hundred thirty million, two hundred seventy thousand, six hundred forty-two".