66776793 has 8 divisors (see below), whose sum is σ = 89391456. Its totient is φ = 44340000.

The previous prime is 66776791. The next prime is 66776803. The reversal of 66776793 is 39767766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66776793 - 2¹ = 66776791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66776791) 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 7 ways as a sum of consecutive naturals, for example, 43588 + ... + 45093.

It is an arithmetic number, because the mean of its divisors is an integer number (11173932).

Almost surely, 2^66776793 is an apocalyptic number.

It is an amenable number.

66776793 is a deficient number, since it is larger than the sum of its proper divisors (22614663).

66776793 is a wasteful number, since it uses less digits than its factorization.

66776793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88935.

The product of its digits is 2000376, while the sum is 51.

The square root of 66776793 is about 8171.7068596469. The cubic root of 66776793 is about 405.7032804127.

The spelling of 66776793 in words is "sixty-six million, seven hundred seventy-six thousand, seven hundred ninety-three".