65650740 has 96 divisors (see below), whose sum is σ = 193971456. Its totient is φ = 16558080.

The previous prime is 65650733. The next prime is 65650769. The reversal of 65650740 is 4705656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155730 + ... + 156150.

It is an arithmetic number, because the mean of its divisors is an integer number (2020536).

Almost surely, 2^65650740 is an apocalyptic number.

65650740 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 65650740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96985728).

65650740 is an abundant number, since it is smaller than the sum of its proper divisors (128320716).

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

65650740 is a wasteful number, since it uses less digits than its factorization.

65650740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 65650740 is about 8102.5144245475. The cubic root of 65650740 is about 403.4098906805.

The spelling of 65650740 in words is "sixty-five million, six hundred fifty thousand, seven hundred forty".