66268879 has 2 divisors, whose sum is σ = 66268880. Its totient is φ = 66268878.

The previous prime is 66268877. The next prime is 66268883. The reversal of 66268879 is 97886266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66268879 - 2¹ = 66268877 is a prime.

Together with 66268877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66268871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33134439 + 33134440.

It is an arithmetic number, because the mean of its divisors is an integer number (33134440).

Almost surely, 2^66268879 is an apocalyptic number.

66268879 is a deficient number, since it is larger than the sum of its proper divisors (1).

66268879 is an equidigital number, since it uses as much as digits as its factorization.

66268879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The square root of 66268879 is about 8140.5699431919. The cubic root of 66268879 is about 404.6720486908.

The spelling of 66268879 in words is "sixty-six million, two hundred sixty-eight thousand, eight hundred seventy-nine".