78006634 has 4 divisors (see below), whose sum is σ = 117009954. Its totient is φ = 39003316.

The previous prime is 78006629. The next prime is 78006667. The reversal of 78006634 is 43660087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43660087 = 563 ⋅77549.

It can be written as a sum of positive squares in only one way, i.e., 77000625 + 1006009 = 8775^2 + 1003^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78006634.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19501657 + ... + 19501660.

Almost surely, 2^78006634 is an apocalyptic number.

78006634 is a deficient number, since it is larger than the sum of its proper divisors (39003320).

78006634 is a wasteful number, since it uses less digits than its factorization.

78006634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39003319.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 78006634 is about 8832.1364346346. The cubic root of 78006634 is about 427.2779809963.

The spelling of 78006634 in words is "seventy-eight million, six thousand, six hundred thirty-four".