65690920 has 16 divisors (see below), whose sum is σ = 147804660. Its totient is φ = 26276352.

The previous prime is 65690899. The next prime is 65690929. The reversal of 65690920 is 2909656.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65512836 + 178084 = 8094^2 + 422^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65690920.

It is not an unprimeable number, because it can be changed into a prime (65690929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821097 + ... + 821176.

Almost surely, 2^65690920 is an apocalyptic number.

It is an amenable number.

65690920 is an abundant number, since it is smaller than the sum of its proper divisors (82113740).

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

65690920 is a wasteful number, since it uses less digits than its factorization.

65690920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642284 (or 1642280 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 65690920 is about 8104.9935225144. The cubic root of 65690920 is about 403.4921730927.

The spelling of 65690920 in words is "sixty-five million, six hundred ninety thousand, nine hundred twenty".