66685033 has 16 divisors (see below), whose sum is σ = 72382464. Its totient is φ = 61205760.

The previous prime is 66684997. The next prime is 66685039. The reversal of 66685033 is 33058666.

It is a cyclic number.

It is not a de Polignac number, because 66685033 - 2¹⁷ = 66553961 is a prime.

It is a super-2 number, since 2×66685033² = 8893787252422178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66684983 and 66685001.

It is not an unprimeable number, because it can be changed into a prime (66685039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144423 + ... + 144883.

It is an arithmetic number, because the mean of its divisors is an integer number (4523904).

Almost surely, 2^66685033 is an apocalyptic number.

It is an amenable number.

66685033 is a deficient number, since it is larger than the sum of its proper divisors (5697431).

66685033 is a wasteful number, since it uses less digits than its factorization.

66685033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 66685033 is about 8166.0904354532. The cubic root of 66685033 is about 405.5173655357.

The spelling of 66685033 in words is "sixty-six million, six hundred eighty-five thousand, thirty-three".