78966037 has 4 divisors (see below), whose sum is σ = 83611116. Its totient is φ = 74320960.

The previous prime is 78966011. The next prime is 78966053. The reversal of 78966037 is 73066987.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61999876 + 16966161 = 7874^2 + 4119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78966037 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 (78966007) 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, 2322514 + ... + 2322547.

It is an arithmetic number, because the mean of its divisors is an integer number (20902779).

Almost surely, 2^78966037 is an apocalyptic number.

It is an amenable number.

78966037 is a deficient number, since it is larger than the sum of its proper divisors (4645079).

78966037 is a wasteful number, since it uses less digits than its factorization.

78966037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645078.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 78966037 is about 8886.2836439087. The cubic root of 78966037 is about 429.0225445161.

The spelling of 78966037 in words is "seventy-eight million, nine hundred sixty-six thousand, thirty-seven".