667165442 has 16 divisors (see below), whose sum is σ = 1060866072. Its totient is φ = 313589760.

The previous prime is 667165427. The next prime is 667165453. The reversal of 667165442 is 244561766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 330112561 + 337052881 = 18169^2 + 18359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 667165442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18818 + ... + 41090.

Almost surely, 2^667165442 is an apocalyptic number.

667165442 is a deficient number, since it is larger than the sum of its proper divisors (393700630).

667165442 is a wasteful number, since it uses less digits than its factorization.

667165442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23173.

The product of its digits is 241920, while the sum is 41.

The square root of 667165442 is about 25829.5459116106. The cubic root of 667165442 is about 873.7982706210.

The spelling of 667165442 in words is "six hundred sixty-seven million, one hundred sixty-five thousand, four hundred forty-two".