65061820 has 12 divisors (see below), whose sum is σ = 136629864. Its totient is φ = 26024720.

The previous prime is 65061809. The next prime is 65061827. The reversal of 65061820 is 2816056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65061827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1626526 + ... + 1626565.

It is an arithmetic number, because the mean of its divisors is an integer number (11385822).

Almost surely, 2^65061820 is an apocalyptic number.

It is an amenable number.

65061820 is an abundant number, since it is smaller than the sum of its proper divisors (71568044).

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

65061820 is a wasteful number, since it uses less digits than its factorization.

65061820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253100 (or 3253098 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 65061820 is about 8066.0907507912. The cubic root of 65061820 is about 402.2000027859.

Adding to 65061820 its reverse (2816056), we get a palindrome (67877876).

The spelling of 65061820 in words is "sixty-five million, sixty-one thousand, eight hundred twenty".