66604026 has 16 divisors (see below), whose sum is σ = 133451424. Its totient is φ = 22160784.

The previous prime is 66604019. The next prime is 66604037. The reversal of 66604026 is 62040666.

It is a junction number, because it is equal to n+sod(n) for n = 66603984 and 66604002.

It is an unprimeable number.

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, 6481 + ... + 13236.

It is an arithmetic number, because the mean of its divisors is an integer number (8340714).

Almost surely, 2^66604026 is an apocalyptic number.

66604026 is an abundant number, since it is smaller than the sum of its proper divisors (66847398).

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

66604026 is a wasteful number, since it uses less digits than its factorization.

66604026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20285.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66604026 is about 8161.1289660193. The cubic root of 66604026 is about 405.3530955121.

The spelling of 66604026 in words is "sixty-six million, six hundred four thousand, twenty-six".