65679809474 has 4 divisors (see below), whose sum is σ = 98519714214. Its totient is φ = 32839904736.

The previous prime is 65679809473. The next prime is 65679809479. The reversal of 65679809474 is 47490897656.

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., 42314547025 + 23365262449 = 205705^2 + 152857^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65679809474.

It is not an unprimeable number, because it can be changed into a prime (65679809473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16419952367 + ... + 16419952370.

Almost surely, 2^65679809474 is an apocalyptic number.

65679809474 is a deficient number, since it is larger than the sum of its proper divisors (32839904740).

65679809474 is a wasteful number, since it uses less digits than its factorization.

65679809474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32839904739.

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 65679809474 in words is "sixty-five billion, six hundred seventy-nine million, eight hundred nine thousand, four hundred seventy-four".