66927963 has 32 divisors (see below), whose sum is σ = 97203456. Its totient is φ = 40808448.

The previous prime is 66927943. The next prime is 66928009. The reversal of 66927963 is 36972966.

It is not a de Polignac number, because 66927963 - 2¹⁰ = 66926939 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66927943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 410520 + ... + 410682.

It is an arithmetic number, because the mean of its divisors is an integer number (3037608).

Almost surely, 2^66927963 is an apocalyptic number.

66927963 is a deficient number, since it is larger than the sum of its proper divisors (30275493).

66927963 is a wasteful number, since it uses less digits than its factorization.

66927963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its digits is 734832, while the sum is 48.

The square root of 66927963 is about 8180.9512283108. The cubic root of 66927963 is about 406.0091947896.

The spelling of 66927963 in words is "sixty-six million, nine hundred twenty-seven thousand, nine hundred sixty-three".