66956107 has 2 divisors, whose sum is σ = 66956108. Its totient is φ = 66956106.

The previous prime is 66956069. The next prime is 66956129. The reversal of 66956107 is 70165966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66956107 - 2¹⁹ = 66431819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66956107.

It is not a weakly prime, because it can be changed into another prime (66956167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33478053 + 33478054.

It is an arithmetic number, because the mean of its divisors is an integer number (33478054).

Almost surely, 2^66956107 is an apocalyptic number.

66956107 is a deficient number, since it is larger than the sum of its proper divisors (1).

66956107 is an equidigital number, since it uses as much as digits as its factorization.

66956107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 66956107 is about 8182.6711408928. The cubic root of 66956107 is about 406.0660973704.

The spelling of 66956107 in words is "sixty-six million, nine hundred fifty-six thousand, one hundred seven".