78706670 has 48 divisors (see below), whose sum is σ = 165754080. Its totient is φ = 26359104.

The previous prime is 78706657. The next prime is 78706679. The reversal of 78706670 is 7660787.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78706679) 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 23 ways as a sum of consecutive naturals, for example, 154376 + ... + 154884.

It is an arithmetic number, because the mean of its divisors is an integer number (3453210).

Almost surely, 2^78706670 is an apocalyptic number.

78706670 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78706670 is an abundant number, since it is smaller than the sum of its proper divisors (87047410).

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

78706670 is a wasteful number, since it uses less digits than its factorization.

78706670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 78706670 is about 8871.6779698093. The cubic root of 78706670 is about 428.5523156027.

The spelling of 78706670 in words is "seventy-eight million, seven hundred six thousand, six hundred seventy".