78664034 has 8 divisors (see below), whose sum is σ = 118098540. Its totient is φ = 39297856.

The previous prime is 78664021. The next prime is 78664039. The reversal of 78664034 is 43046687.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78411025 + 253009 = 8855^2 + 503^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78664039) 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, 14099 + ... + 18870.

Almost surely, 2^78664034 is an apocalyptic number.

78664034 is a deficient number, since it is larger than the sum of its proper divisors (39434506).

78664034 is a wasteful number, since it uses less digits than its factorization.

78664034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34164.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 78664034 is about 8869.2747166834. The cubic root of 78664034 is about 428.4749182790.

The spelling of 78664034 in words is "seventy-eight million, six hundred sixty-four thousand, thirty-four".