65684394 has 12 divisors (see below), whose sum is σ = 142316226. Its totient is φ = 21894792.

The previous prime is 65684393. The next prime is 65684407. The reversal of 65684394 is 49348656.

It can be written as a sum of positive squares in only one way, i.e., 64208169 + 1476225 = 8013^2 + 1215^2 .

It is not an unprimeable number, because it can be changed into a prime (65684393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1824549 + ... + 1824584.

Almost surely, 2^65684394 is an apocalyptic number.

65684394 is an abundant number, since it is smaller than the sum of its proper divisors (76631832).

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

65684394 is a wasteful number, since it uses less digits than its factorization.

65684394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649141 (or 3649138 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 65684394 is about 8104.5909212002. The cubic root of 65684394 is about 403.4788111389.

The spelling of 65684394 in words is "sixty-five million, six hundred eighty-four thousand, three hundred ninety-four".