66058266077 has 4 divisors (see below), whose sum is σ = 66219778140. Its totient is φ = 65896754016.

The previous prime is 66058266041. The next prime is 66058266107. The reversal of 66058266077 is 77066285066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41768731876 + 24289534201 = 204374^2 + 155851^2 .

It is a cyclic number.

It is not a de Polignac number, because 66058266077 - 2¹⁶ = 66058200541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66058266037) 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 3 ways as a sum of consecutive naturals, for example, 80755418 + ... + 80756235.

It is an arithmetic number, because the mean of its divisors is an integer number (16554944535).

Almost surely, 2^66058266077 is an apocalyptic number.

It is an amenable number.

66058266077 is a deficient number, since it is larger than the sum of its proper divisors (161512063).

66058266077 is a wasteful number, since it uses less digits than its factorization.

66058266077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161512062.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 66058266077 in words is "sixty-six billion, fifty-eight million, two hundred sixty-six thousand, seventy-seven".