65676521 has 8 divisors (see below), whose sum is σ = 69208320. Its totient is φ = 62152272.

The previous prime is 65676511. The next prime is 65676539. The reversal of 65676521 is 12567656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65676521 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65676511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29576 + ... + 31718.

It is an arithmetic number, because the mean of its divisors is an integer number (8651040).

Almost surely, 2^65676521 is an apocalyptic number.

It is an amenable number.

65676521 is a deficient number, since it is larger than the sum of its proper divisors (3531799).

65676521 is a wasteful number, since it uses less digits than its factorization.

65676521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775.

The product of its digits is 75600, while the sum is 38.

The square root of 65676521 is about 8104.1051942827. The cubic root of 65676521 is about 403.4626900310.

It can be divided in two parts, 656 and 76521, that added together give a palindrome (77177).

The spelling of 65676521 in words is "sixty-five million, six hundred seventy-six thousand, five hundred twenty-one".