66904041 has 8 divisors (see below), whose sum is σ = 89740224. Its totient is φ = 44335280.

The previous prime is 66904031. The next prime is 66904049. The reversal of 66904041 is 14040966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66904041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66904049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66270 + ... + 67271.

It is an arithmetic number, because the mean of its divisors is an integer number (11217528).

Almost surely, 2^66904041 is an apocalyptic number.

It is an amenable number.

66904041 is a deficient number, since it is larger than the sum of its proper divisors (22836183).

66904041 is a wasteful number, since it uses less digits than its factorization.

66904041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133711.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66904041 is about 8179.4890427214. The cubic root of 66904041 is about 405.9608158613.

It can be divided in two parts, 6690 and 4041, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 66904041 in words is "sixty-six million, nine hundred four thousand, forty-one".