65725480978 has 4 divisors (see below), whose sum is σ = 98588221470. Its totient is φ = 32862740488.

The previous prime is 65725480973. The next prime is 65725480981. The reversal of 65725480978 is 87908452756.

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

It can be written as a sum of positive squares in only one way, i.e., 42044272209 + 23681208769 = 205047^2 + 153887^2 .

It is not an unprimeable number, because it can be changed into a prime (65725480973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16431370243 + ... + 16431370246.

Almost surely, 2^65725480978 is an apocalyptic number.

65725480978 is a deficient number, since it is larger than the sum of its proper divisors (32862740492).

65725480978 is a wasteful number, since it uses less digits than its factorization.

65725480978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32862740491.

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 65725480978 in words is "sixty-five billion, seven hundred twenty-five million, four hundred eighty thousand, nine hundred seventy-eight".