42668372661 has 16 divisors (see below), whose sum is σ = 57767985600. Its totient is φ = 28007578368.

The previous prime is 42668372639. The next prime is 42668372683. The reversal of 42668372661 is 16627386624.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42668372639) and next prime (42668372683).

It is not a de Polignac number, because 42668372661 - 2¹⁰ = 42668371637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42668372161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378075 + ... + 477783.

It is an arithmetic number, because the mean of its divisors is an integer number (3610499100).

Almost surely, 2^42668372661 is an apocalyptic number.

It is an amenable number.

42668372661 is a deficient number, since it is larger than the sum of its proper divisors (15099612939).

42668372661 is a wasteful number, since it uses less digits than its factorization.

42668372661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101908.

The product of its digits is 3483648, while the sum is 51.

The spelling of 42668372661 in words is "forty-two billion, six hundred sixty-eight million, three hundred seventy-two thousand, six hundred sixty-one".