65765680 has 40 divisors (see below), whose sum is σ = 154132992. Its totient is φ = 26095104.

The previous prime is 65765677. The next prime is 65765699. The reversal of 65765680 is 8656756.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×65765680³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6924 + ... + 13396.

Almost surely, 2^65765680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65765680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77066496).

65765680 is an abundant number, since it is smaller than the sum of its proper divisors (88367312).

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

65765680 is a wasteful number, since it uses less digits than its factorization.

65765680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6613 (or 6607 counting only the distinct ones).

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

The square root of 65765680 is about 8109.6041826960. The cubic root of 65765680 is about 403.6451807377.

The spelling of 65765680 in words is "sixty-five million, seven hundred sixty-five thousand, six hundred eighty".