65978914 has 8 divisors (see below), whose sum is σ = 99048348. Its totient is φ = 32962800.

The previous prime is 65978911. The next prime is 65978917. The reversal of 65978914 is 41987956.

65978914 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65978911) and next prime (65978917).

It can be written as a sum of positive squares in 2 ways, for example, as 52780225 + 13198689 = 7265^2 + 3633^2 .

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 (65978911) 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 3 ways as a sum of consecutive naturals, for example, 10077 + ... + 15280.

Almost surely, 2^65978914 is an apocalyptic number.

65978914 is a deficient number, since it is larger than the sum of its proper divisors (33069434).

65978914 is a wasteful number, since it uses less digits than its factorization.

65978914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26660.

The product of its digits is 544320, while the sum is 49.

The square root of 65978914 is about 8122.7405473769. The cubic root of 65978914 is about 404.0809603130.

The spelling of 65978914 in words is "sixty-five million, nine hundred seventy-eight thousand, nine hundred fourteen".