90144666 has 24 divisors (see below), whose sum is σ = 195695604. Its totient is φ = 29989440.

The previous prime is 90144661. The next prime is 90144667. The reversal of 90144666 is 66644109.

It can be written as a sum of positive squares in 2 ways, for example, as 81270225 + 8874441 = 9015^2 + 2979^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90144666.

It is not an unprimeable number, because it can be changed into a prime (90144661) 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 11 ways as a sum of consecutive naturals, for example, 5110 + ... + 14366.

Almost surely, 2^90144666 is an apocalyptic number.

90144666 is an abundant number, since it is smaller than the sum of its proper divisors (105550938).

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

90144666 is a wasteful number, since it uses less digits than its factorization.

90144666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9806 (or 9803 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 90144666 is about 9494.4544866991. The cubic root of 90144666 is about 448.3804597839.

The spelling of 90144666 in words is "ninety million, one hundred forty-four thousand, six hundred sixty-six".