1665422598 has 32 divisors (see below), whose sum is σ = 3808062720. Its totient is φ = 475662240.

The previous prime is 1665422597. The next prime is 1665422653. The reversal of 1665422598 is 8952245661.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665422593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150433 + ... + 161123.

It is an arithmetic number, because the mean of its divisors is an integer number (119001960).

Almost surely, 2^1665422598 is an apocalyptic number.

1665422598 is an abundant number, since it is smaller than the sum of its proper divisors (2142640122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665422598 is a wasteful number, since it uses less digits than its factorization.

1665422598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14412.

The product of its digits is 1036800, while the sum is 48.

The square root of 1665422598 is about 40809.5895348140. The cubic root of 1665422598 is about 1185.3360267651.

The spelling of 1665422598 in words is "one billion, six hundred sixty-five million, four hundred twenty-two thousand, five hundred ninety-eight".