42166526425 has 6 divisors (see below), whose sum is σ = 52286492798. Its totient is φ = 33733221120.

The previous prime is 42166526417. The next prime is 42166526429. The reversal of 42166526425 is 52462566124.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 627602704 + 41538923721 = 25052^2 + 203811^2 .

It is not a de Polignac number, because 42166526425 - 2³ = 42166526417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42166526429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 843330504 + ... + 843330553.

Almost surely, 2^42166526425 is an apocalyptic number.

It is an amenable number.

42166526425 is a deficient number, since it is larger than the sum of its proper divisors (10119966373).

42166526425 is a wasteful number, since it uses less digits than its factorization.

42166526425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686661067 (or 1686661062 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 42166526425 in words is "forty-two billion, one hundred sixty-six million, five hundred twenty-six thousand, four hundred twenty-five".