66076758916 has 135 divisors (see below), whose sum is σ = 140410020933. Its totient is φ = 27206595360.

The previous prime is 66076758887. The next prime is 66076758919. The reversal of 66076758916 is 61985767066.

The square root of 66076758916 is 257054.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2148693316 + 63928065600 = 46354^2 + 252840^2 .

It is a super-2 number, since 2×66076758916² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is not an unprimeable number, because it can be changed into a prime (66076758919) 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 44 ways as a sum of consecutive naturals, for example, 1083225526 + ... + 1083225586.

Almost surely, 2^66076758916 is an apocalyptic number.

66076758916 is the 257054-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66076758916

66076758916 is an abundant number, since it is smaller than the sum of its proper divisors (74333262017).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66076758916 is an frugal number, since it uses more digits than its factorization.

66076758916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 66076758916 in words is "sixty-six billion, seventy-six million, seven hundred fifty-eight thousand, nine hundred sixteen".