78064671 has 4 divisors (see below), whose sum is σ = 104086232. Its totient is φ = 52043112.

The previous prime is 78064633. The next prime is 78064681. The reversal of 78064671 is 17646087.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78064671 - 2¹⁵ = 78031903 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 (78064621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13010776 + ... + 13010781.

It is an arithmetic number, because the mean of its divisors is an integer number (26021558).

Almost surely, 2^78064671 is an apocalyptic number.

78064671 is a deficient number, since it is larger than the sum of its proper divisors (26021561).

78064671 is a wasteful number, since it uses less digits than its factorization.

78064671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26021560.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 78064671 is about 8835.4213821413. The cubic root of 78064671 is about 427.3839197845.

The spelling of 78064671 in words is "seventy-eight million, sixty-four thousand, six hundred seventy-one".