65278706 has 8 divisors (see below), whose sum is σ = 98325084. Its totient is φ = 32503680.

The previous prime is 65278637. The next prime is 65278747. The reversal of 65278706 is 60787256.

It is a happy number.

65278706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 49350625 + 15928081 = 7025^2 + 3991^2 .

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

It is a super-4 number, since 4×65278706⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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, 67235 + ... + 68198.

Almost surely, 2^65278706 is an apocalyptic number.

65278706 is a deficient number, since it is larger than the sum of its proper divisors (33046378).

65278706 is a wasteful number, since it uses less digits than its factorization.

65278706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135676.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 65278706 is about 8079.5238721103. The cubic root of 65278706 is about 402.6464233290.

The spelling of 65278706 in words is "sixty-five million, two hundred seventy-eight thousand, seven hundred six".