65725740 has 144 divisors (see below), whose sum is σ = 216058752. Its totient is φ = 16109568.

The previous prime is 65725739. The next prime is 65725741. The reversal of 65725740 is 4752756.

It is an interprime number because it is at equal distance from previous prime (65725739) and next prime (65725741).

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

It is a junction number, because it is equal to n+sod(n) for n = 65725695 and 65725704.

It is not an unprimeable number, because it can be changed into a prime (65725741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143592 + ... + 144048.

It is an arithmetic number, because the mean of its divisors is an integer number (1500408).

Almost surely, 2^65725740 is an apocalyptic number.

65725740 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 65725740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108029376).

65725740 is an abundant number, since it is smaller than the sum of its proper divisors (150333012).

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

65725740 is a wasteful number, since it uses less digits than its factorization.

65725740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 65725740 is about 8107.1412964127. The cubic root of 65725740 is about 403.5634519231.

The spelling of 65725740 in words is "sixty-five million, seven hundred twenty-five thousand, seven hundred forty".