78661076 has 12 divisors (see below), whose sum is σ = 148245972. Its totient is φ = 36305088.

The previous prime is 78661067. The next prime is 78661087. The reversal of 78661076 is 67016687.

It can be written as a sum of positive squares in 2 ways, for example, as 30691600 + 47969476 = 5540^2 + 6926^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756305 + ... + 756408.

It is an arithmetic number, because the mean of its divisors is an integer number (12353831).

Almost surely, 2^78661076 is an apocalyptic number.

It is an amenable number.

78661076 is a deficient number, since it is larger than the sum of its proper divisors (69584896).

78661076 is a wasteful number, since it uses less digits than its factorization.

78661076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512730 (or 1512728 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 78661076 is about 8869.1079596541. The cubic root of 78661076 is about 428.4695475709.

The spelling of 78661076 in words is "seventy-eight million, six hundred sixty-one thousand, seventy-six".