65684450715 has 16 divisors (see below), whose sum is σ = 113179361568. Its totient is φ = 32336960256.

The previous prime is 65684450701. The next prime is 65684450717. The reversal of 65684450715 is 51705448656.

It is a happy number.

It is not a de Polignac number, because 65684450715 - 2⁸ = 65684450459 is a prime.

It is a super-2 number, since 2×65684450715² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65684450717) 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, 168421474 + ... + 168421863.

It is an arithmetic number, because the mean of its divisors is an integer number (7073710098).

Almost surely, 2^65684450715 is an apocalyptic number.

65684450715 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65684450715 is a deficient number, since it is larger than the sum of its proper divisors (47494910853).

65684450715 is a wasteful number, since it uses less digits than its factorization.

65684450715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336843358.

The product of its (nonzero) digits is 4032000, while the sum is 51.

The spelling of 65684450715 in words is "sixty-five billion, six hundred eighty-four million, four hundred fifty thousand, seven hundred fifteen".