42404066669 has 2 divisors, whose sum is σ = 42404066670. Its totient is φ = 42404066668.

The previous prime is 42404066659. The next prime is 42404066687. The reversal of 42404066669 is 96666040424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34075314025 + 8328752644 = 184595^2 + 91262^2 .

It is a cyclic number.

It is not a de Polignac number, because 42404066669 - 2²⁰ = 42403018093 is a prime.

It is a super-2 number, since 2×42404066669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42404066609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21202033334 + 21202033335.

It is an arithmetic number, because the mean of its divisors is an integer number (21202033335).

Almost surely, 2^42404066669 is an apocalyptic number.

It is an amenable number.

42404066669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42404066669 is an equidigital number, since it uses as much as digits as its factorization.

42404066669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 42404066669 in words is "forty-two billion, four hundred four million, sixty-six thousand, six hundred sixty-nine".