65680538 has 32 divisors (see below), whose sum is σ = 124581888. Its totient is φ = 25225200.

The previous prime is 65680523. The next prime is 65680561. The reversal of 65680538 is 83508656.

It is a junction number, because it is equal to n+sod(n) for n = 65680495 and 65680504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7931 + ... + 13937.

It is an arithmetic number, because the mean of its divisors is an integer number (3893184).

Almost surely, 2^65680538 is an apocalyptic number.

65680538 is a deficient number, since it is larger than the sum of its proper divisors (58901350).

65680538 is a wasteful number, since it uses less digits than its factorization.

65680538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6098.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 65680538 is about 8104.3530278487. The cubic root of 65680538 is about 403.4709155813.

The spelling of 65680538 in words is "sixty-five million, six hundred eighty thousand, five hundred thirty-eight".