65676640 has 48 divisors (see below), whose sum is σ = 157314528. Its totient is φ = 25906176.

The previous prime is 65676601. The next prime is 65676641. The reversal of 65676640 is 4667656.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 65676593 and 65676602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65676641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8869 + ... + 14491.

It is an arithmetic number, because the mean of its divisors is an integer number (3277386).

Almost surely, 2^65676640 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 65676640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78657264).

65676640 is an abundant number, since it is smaller than the sum of its proper divisors (91637888).

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

65676640 is a wasteful number, since it uses less digits than its factorization.

65676640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711 (or 5703 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 65676640 is about 8104.1125362374. The cubic root of 65676640 is about 403.4629337103.

The spelling of 65676640 in words is "sixty-five million, six hundred seventy-six thousand, six hundred forty".