65476440 has 96 divisors (see below), whose sum is σ = 213969600. Its totient is φ = 17364480.

The previous prime is 65476391. The next prime is 65476457. The reversal of 65476440 is 4467456.

65476440 is a `hidden beast` number, since 6 + 5 + 4 + 7 + 644 + 0 = 666.

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 = 65476395 and 65476404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85660 + ... + 86420.

It is an arithmetic number, because the mean of its divisors is an integer number (2228850).

Almost surely, 2^65476440 is an apocalyptic number.

65476440 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 65476440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106984800).

65476440 is an abundant number, since it is smaller than the sum of its proper divisors (148493160).

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

65476440 is a wasteful number, since it uses less digits than its factorization.

65476440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 65476440 is about 8091.7513555472. The cubic root of 65476440 is about 403.0525620700.

The spelling of 65476440 in words is "sixty-five million, four hundred seventy-six thousand, four hundred forty".