65722680 has 96 divisors (see below), whose sum is σ = 226184400. Its totient is φ = 16493568.

The previous prime is 65722669. The next prime is 65722687. The reversal of 65722680 is 8622756.

65722680 is a `hidden beast` number, since 6 + 572 + 2 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65722687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 751 + ... + 11489.

Almost surely, 2^65722680 is an apocalyptic number.

65722680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65722680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113092200).

65722680 is an abundant number, since it is smaller than the sum of its proper divisors (160461720).

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

65722680 is a wasteful number, since it uses less digits than its factorization.

65722680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10773 (or 10766 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 65722680 is about 8106.9525717128. The cubic root of 65722680 is about 403.5571889109.

The spelling of 65722680 in words is "sixty-five million, seven hundred twenty-two thousand, six hundred eighty".