78296649066 has 12 divisors (see below), whose sum is σ = 169642739682. Its totient is φ = 26098883016.

The previous prime is 78296649061. The next prime is 78296649077. The reversal of 78296649066 is 66094669287.

78296649066 is a `hidden beast` number, since 7 + 8 + 29 + 66 + 490 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71665967025 + 6630682041 = 267705^2 + 81429^2 .

It is a super-2 number, since 2×78296649066² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78296648994 and 78296649012.

It is not an unprimeable number, because it can be changed into a prime (78296649061) 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 5 ways as a sum of consecutive naturals, for example, 2174906901 + ... + 2174906936.

Almost surely, 2^78296649066 is an apocalyptic number.

78296649066 is an abundant number, since it is smaller than the sum of its proper divisors (91346090616).

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

78296649066 is a wasteful number, since it uses less digits than its factorization.

78296649066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349813845 (or 4349813842 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 78296649066 in words is "seventy-eight billion, two hundred ninety-six million, six hundred forty-nine thousand, sixty-six".