66034640077 has 4 divisors (see below), whose sum is σ = 75468160096. Its totient is φ = 56601120060.

The previous prime is 66034640053. The next prime is 66034640101. The reversal of 66034640077 is 77004643066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (66034640053) and next prime (66034640101).

It is a cyclic number.

It is not a de Polignac number, because 66034640077 - 2⁷ = 66034639949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66034640377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4716759999 + ... + 4716760012.

It is an arithmetic number, because the mean of its divisors is an integer number (18867040024).

Almost surely, 2^66034640077 is an apocalyptic number.

It is an amenable number.

66034640077 is a deficient number, since it is larger than the sum of its proper divisors (9433520019).

66034640077 is an equidigital number, since it uses as much as digits as its factorization.

66034640077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433520018.

The product of its (nonzero) digits is 508032, while the sum is 43.

The spelling of 66034640077 in words is "sixty-six billion, thirty-four million, six hundred forty thousand, seventy-seven".