71678807 has 16 divisors (see below), whose sum is σ = 77552640. Its totient is φ = 66105312.

The previous prime is 71678797. The next prime is 71678813. The reversal of 71678807 is 70887617.

It is not a de Polignac number, because 71678807 - 2⁶ = 71678743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71678897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57998 + ... + 59220.

It is an arithmetic number, because the mean of its divisors is an integer number (4847040).

Almost surely, 2^71678807 is an apocalyptic number.

71678807 is a deficient number, since it is larger than the sum of its proper divisors (5873833).

71678807 is a wasteful number, since it uses less digits than its factorization.

71678807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342.

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 71678807 is about 8466.3337401735. Note that the first 3 decimals coincide. The cubic root of 71678807 is about 415.3972235797.

The spelling of 71678807 in words is "seventy-one million, six hundred seventy-eight thousand, eight hundred seven".