42005140661 has 8 divisors (see below), whose sum is σ = 45825904224. Its totient is φ = 38184729520.

The previous prime is 42005140637. The next prime is 42005140669. The reversal of 42005140661 is 16604150024.

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

It is a cyclic number.

It is not a de Polignac number, because 42005140661 - 2¹⁴ = 42005124277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005140669) 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, 202931 + ... + 353823.

It is an arithmetic number, because the mean of its divisors is an integer number (5728238028).

Almost surely, 2^42005140661 is an apocalyptic number.

It is an amenable number.

42005140661 is a deficient number, since it is larger than the sum of its proper divisors (3820763563).

42005140661 is a wasteful number, since it uses less digits than its factorization.

42005140661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176211.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 42005140661 its reverse (16604150024), we get a palindrome (58609290685).

The spelling of 42005140661 in words is "forty-two billion, five million, one hundred forty thousand, six hundred sixty-one".