78069656 has 32 divisors (see below), whose sum is σ = 172692480. Its totient is φ = 32378400.

The previous prime is 78069623. The next prime is 78069701. The reversal of 78069656 is 65696087.

It is a self number, because there is not a number n which added to its sum of digits gives 78069656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20750 + ... + 24221.

It is an arithmetic number, because the mean of its divisors is an integer number (5396640).

Almost surely, 2^78069656 is an apocalyptic number.

It is an amenable number.

78069656 is an abundant number, since it is smaller than the sum of its proper divisors (94622824).

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

78069656 is a wasteful number, since it uses less digits than its factorization.

78069656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45015 (or 45011 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 78069656 is about 8835.7034807648. The cubic root of 78069656 is about 427.3930167869.

The spelling of 78069656 in words is "seventy-eight million, sixty-nine thousand, six hundred fifty-six".