66797255 has 16 divisors (see below), whose sum is σ = 96430080. Its totient is φ = 43392672.

The previous prime is 66797209. The next prime is 66797279. The reversal of 66797255 is 55279766.

It is a cyclic number.

It is not a de Polignac number, because 66797255 - 2⁸ = 66796999 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49559 + ... + 50888.

It is an arithmetic number, because the mean of its divisors is an integer number (6026880).

Almost surely, 2^66797255 is an apocalyptic number.

66797255 is a deficient number, since it is larger than the sum of its proper divisors (29632825).

66797255 is a wasteful number, since it uses less digits than its factorization.

66797255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100478.

The product of its digits is 793800, while the sum is 47.

The square root of 66797255 is about 8172.9587665667. The cubic root of 66797255 is about 405.7447152305.

The spelling of 66797255 in words is "sixty-six million, seven hundred ninety-seven thousand, two hundred fifty-five".