65662140 has 48 divisors (see below), whose sum is σ = 184228128. Its totient is φ = 17474304.

The previous prime is 65662133. The next prime is 65662141. The reversal of 65662140 is 4126656.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 65662098 and 65662107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65662141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43234 + ... + 44726.

It is an arithmetic number, because the mean of its divisors is an integer number (3838086).

Almost surely, 2^65662140 is an apocalyptic number.

65662140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65662140 is an abundant number, since it is smaller than the sum of its proper divisors (118565988).

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

65662140 is a wasteful number, since it uses less digits than its factorization.

65662140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 65662140 is about 8103.2178793366. The cubic root of 65662140 is about 403.4332395241.

Adding to 65662140 its reverse (4126656), we get a palindrome (69788796).

The spelling of 65662140 in words is "sixty-five million, six hundred sixty-two thousand, one hundred forty".