66504927 has 4 divisors (see below), whose sum is σ = 88673240. Its totient is φ = 44336616.

The previous prime is 66504913. The next prime is 66504943. The reversal of 66504927 is 72940566.

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

It is not a de Polignac number, because 66504927 - 2¹⁰ = 66503903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66504227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11084152 + ... + 11084157.

It is an arithmetic number, because the mean of its divisors is an integer number (22168310).

Almost surely, 2^66504927 is an apocalyptic number.

66504927 is a deficient number, since it is larger than the sum of its proper divisors (22168313).

66504927 is a wasteful number, since it uses less digits than its factorization.

66504927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22168312.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 66504927 is about 8155.0553033073. The cubic root of 66504927 is about 405.1519563913.

The spelling of 66504927 in words is "sixty-six million, five hundred four thousand, nine hundred twenty-seven".