66885074 has 4 divisors (see below), whose sum is σ = 100327614. Its totient is φ = 33442536.

The previous prime is 66885047. The next prime is 66885083. The reversal of 66885074 is 47058866.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56355049 + 10530025 = 7507^2 + 3245^2 .

It is a super-2 number, since 2×66885074² = 8947226247970952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16721267 + ... + 16721270.

Almost surely, 2^66885074 is an apocalyptic number.

66885074 is a deficient number, since it is larger than the sum of its proper divisors (33442540).

66885074 is a wasteful number, since it uses less digits than its factorization.

66885074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33442539.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 66885074 is about 8178.3295360361. The cubic root of 66885074 is about 405.9224495364.

The spelling of 66885074 in words is "sixty-six million, eight hundred eighty-five thousand, seventy-four".