78327668 has 12 divisors (see below), whose sum is σ = 140778372. Its totient is φ = 38105280.

The previous prime is 78327643. The next prime is 78327677. The reversal of 78327668 is 86672387.

It can be written as a sum of positive squares in 2 ways, for example, as 41628304 + 36699364 = 6452^2 + 6058^2 .

It is a super-2 number, since 2×78327668² = 12270447148636448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264473 + ... + 264768.

It is an arithmetic number, because the mean of its divisors is an integer number (11731531).

Almost surely, 2^78327668 is an apocalyptic number.

It is an amenable number.

78327668 is a deficient number, since it is larger than the sum of its proper divisors (62450704).

78327668 is a wasteful number, since it uses less digits than its factorization.

78327668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529282 (or 529280 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 78327668 is about 8850.2919725849. The cubic root of 78327668 is about 427.8633287090.

The spelling of 78327668 in words is "seventy-eight million, three hundred twenty-seven thousand, six hundred sixty-eight".