66927147 has 16 divisors (see below), whose sum is σ = 107983872. Its totient is φ = 35994240.

The previous prime is 66927137. The next prime is 66927149. The reversal of 66927147 is 74172966.

It is not a de Polignac number, because 66927147 - 2⁴ = 66927131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66927099 and 66927108.

It is not an unprimeable number, because it can be changed into a prime (66927149) 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 15 ways as a sum of consecutive naturals, for example, 93379 + ... + 94092.

It is an arithmetic number, because the mean of its divisors is an integer number (6748992).

Almost surely, 2^66927147 is an apocalyptic number.

66927147 is a deficient number, since it is larger than the sum of its proper divisors (41056725).

66927147 is a wasteful number, since it uses less digits than its factorization.

66927147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187498.

The product of its digits is 127008, while the sum is 42.

The square root of 66927147 is about 8180.9013562076. The cubic root of 66927147 is about 406.0075447327.

The spelling of 66927147 in words is "sixty-six million, nine hundred twenty-seven thousand, one hundred forty-seven".