65696349678 has 32 divisors (see below), whose sum is σ = 134964043776. Its totient is φ = 21308946528.

The previous prime is 65696349671. The next prime is 65696349709. The reversal of 65696349678 is 87694369656.

It is a happy number.

It is a super-2 number, since 2×65696349678² (a number of 22 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65696349671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624526 + ... + 722097.

It is an arithmetic number, because the mean of its divisors is an integer number (4217626368).

Almost surely, 2^65696349678 is an apocalyptic number.

65696349678 is an abundant number, since it is smaller than the sum of its proper divisors (69267694098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65696349678 is a wasteful number, since it uses less digits than its factorization.

65696349678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346848.

The product of its digits is 352719360, while the sum is 69.

The spelling of 65696349678 in words is "sixty-five billion, six hundred ninety-six million, three hundred forty-nine thousand, six hundred seventy-eight".