78672655 has 8 divisors (see below), whose sum is σ = 94757184. Its totient is φ = 62704800.

The previous prime is 78672653. The next prime is 78672731. The reversal of 78672655 is 55627687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78672655 - 2¹ = 78672653 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 (78672653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27676 + ... + 30385.

It is an arithmetic number, because the mean of its divisors is an integer number (11844648).

Almost surely, 2^78672655 is an apocalyptic number.

78672655 is a deficient number, since it is larger than the sum of its proper divisors (16084529).

78672655 is a wasteful number, since it uses less digits than its factorization.

78672655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58337.

The product of its digits is 705600, while the sum is 46.

The square root of 78672655 is about 8869.7607070315. The cubic root of 78672655 is about 428.4905702746.

It can be divided in two parts, 786 and 72655, that added together give a square (73441 = 271²).

The spelling of 78672655 in words is "seventy-eight million, six hundred seventy-two thousand, six hundred fifty-five".