66002404 has 24 divisors (see below), whose sum is σ = 124859448. Its totient is φ = 30347520.

The previous prime is 66002401. The next prime is 66002407. The reversal of 66002404 is 40420066.

It is an interprime number because it is at equal distance from previous prime (66002401) and next prime (66002407).

It can be written as a sum of positive squares in 4 ways, for example, as 360000 + 65642404 = 600^2 + 8102^2 .

It is not an unprimeable number, because it can be changed into a prime (66002401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12354 + ... + 16870.

It is an arithmetic number, because the mean of its divisors is an integer number (5202477).

Almost surely, 2^66002404 is an apocalyptic number.

It is an amenable number.

66002404 is a deficient number, since it is larger than the sum of its proper divisors (58857044).

66002404 is a wasteful number, since it uses less digits than its factorization.

66002404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815 (or 4813 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 66002404 is about 8124.1863592608. The cubic root of 66002404 is about 404.1289086395.

The spelling of 66002404 in words is "sixty-six million, two thousand, four hundred four".