66907027 has 4 divisors (see below), whose sum is σ = 72989496. Its totient is φ = 60824560.

The previous prime is 66907013. The next prime is 66907051. The reversal of 66907027 is 72070966.

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

It is a cyclic number.

It is not a de Polignac number, because 66907027 - 2¹⁵ = 66874259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66907327) 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, 3041218 + ... + 3041239.

It is an arithmetic number, because the mean of its divisors is an integer number (18247374).

Almost surely, 2^66907027 is an apocalyptic number.

66907027 is a deficient number, since it is larger than the sum of its proper divisors (6082469).

66907027 is a wasteful number, since it uses less digits than its factorization.

66907027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082468.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 66907027 is about 8179.6715704238. The cubic root of 66907027 is about 405.9668552621.

The spelling of 66907027 in words is "sixty-six million, nine hundred seven thousand, twenty-seven".