65678650 has 24 divisors (see below), whose sum is σ = 129349980. Its totient is φ = 24725760.

The previous prime is 65678617. The next prime is 65678653. The reversal of 65678650 is 5687656.

It can be written as a sum of positive squares in 6 ways, for example, as 37344321 + 28334329 = 6111^2 + 5323^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65678597 and 65678606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65678653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37785 + ... + 39484.

Almost surely, 2^65678650 is an apocalyptic number.

65678650 is a deficient number, since it is larger than the sum of its proper divisors (63671330).

65678650 is a wasteful number, since it uses less digits than its factorization.

65678650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77298 (or 77293 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 65678650 is about 8104.2365463997. The cubic root of 65678650 is about 403.4670495940.

The spelling of 65678650 in words is "sixty-five million, six hundred seventy-eight thousand, six hundred fifty".