6642142605 has 48 divisors (see below), whose sum is σ = 13171317120. Its totient is φ = 3033281664.

The previous prime is 6642142567. The next prime is 6642142657. The reversal of 6642142605 is 5062412466.

6642142605 is a `hidden beast` number, since 6 + 6 + 4 + 2 + 1 + 42 + 605 = 666.

It is not a de Polignac number, because 6642142605 - 2⁶ = 6642142541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6642142605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 310639 + ... + 331331.

It is an arithmetic number, because the mean of its divisors is an integer number (274402440).

Almost surely, 2^6642142605 is an apocalyptic number.

It is an amenable number.

6642142605 is a deficient number, since it is larger than the sum of its proper divisors (6529174515).

6642142605 is a wasteful number, since it uses less digits than its factorization.

6642142605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21730 (or 21727 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6642142605 is about 81499.3411323061. The cubic root of 6642142605 is about 1879.7614195697.

The spelling of 6642142605 in words is "six billion, six hundred forty-two million, one hundred forty-two thousand, six hundred five".