66814695 has 24 divisors (see below), whose sum is σ = 119808000. Its totient is φ = 34405056.

The previous prime is 66814691. The next prime is 66814739. The reversal of 66814695 is 59641866.

It is not a de Polignac number, because 66814695 - 2² = 66814691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66814695.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66814691) 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 23 ways as a sum of consecutive naturals, for example, 24295 + ... + 26904.

It is an arithmetic number, because the mean of its divisors is an integer number (4992000).

Almost surely, 2^66814695 is an apocalyptic number.

66814695 is a deficient number, since it is larger than the sum of its proper divisors (52993305).

66814695 is a wasteful number, since it uses less digits than its factorization.

66814695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51239 (or 51236 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 66814695 is about 8174.0256300063. The cubic root of 66814695 is about 405.7800239274.

The spelling of 66814695 in words is "sixty-six million, eight hundred fourteen thousand, six hundred ninety-five".