65486978 has 8 divisors (see below), whose sum is σ = 98385168. Its totient is φ = 32691924.

The previous prime is 65486951. The next prime is 65486987. The reversal of 65486978 is 87968456.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24176 + ... + 26747.

It is an arithmetic number, because the mean of its divisors is an integer number (12298146).

Almost surely, 2^65486978 is an apocalyptic number.

65486978 is a deficient number, since it is larger than the sum of its proper divisors (32898190).

65486978 is a wasteful number, since it uses less digits than its factorization.

65486978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51568.

The product of its digits is 2903040, while the sum is 53.

The square root of 65486978 is about 8092.4024862830. The cubic root of 65486978 is about 403.0741837915.

The spelling of 65486978 in words is "sixty-five million, four hundred eighty-six thousand, nine hundred seventy-eight".