66927057 has 8 divisors (see below), whose sum is σ = 90458784. Its totient is φ = 44006688.

The previous prime is 66927053. The next prime is 66927067. The reversal of 66927057 is 75072966.

It is a happy number.

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

It is not a de Polignac number, because 66927057 - 2² = 66927053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66927053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152583 + ... + 153020.

It is an arithmetic number, because the mean of its divisors is an integer number (11307348).

Almost surely, 2^66927057 is an apocalyptic number.

It is an amenable number.

66927057 is a deficient number, since it is larger than the sum of its proper divisors (23531727).

66927057 is a wasteful number, since it uses less digits than its factorization.

66927057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305679.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 66927057 is about 8180.8958555894. The cubic root of 66927057 is about 406.0073627403.

The spelling of 66927057 in words is "sixty-six million, nine hundred twenty-seven thousand, fifty-seven".