42166052507 has 4 divisors (see below), whose sum is σ = 42674077320. Its totient is φ = 41658027696.

The previous prime is 42166052503. The next prime is 42166052521. The reversal of 42166052507 is 70525066124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42166052507 - 2² = 42166052503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42166052503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254012282 + ... + 254012447.

It is an arithmetic number, because the mean of its divisors is an integer number (10668519330).

Almost surely, 2^42166052507 is an apocalyptic number.

42166052507 is a deficient number, since it is larger than the sum of its proper divisors (508024813).

42166052507 is an equidigital number, since it uses as much as digits as its factorization.

42166052507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508024812.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 42166052507 in words is "forty-two billion, one hundred sixty-six million, fifty-two thousand, five hundred seven".