65122656 has 48 divisors (see below), whose sum is σ = 171460800. Its totient is φ = 21642368.

The previous prime is 65122649. The next prime is 65122657. The reversal of 65122656 is 65622156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65122657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39415 + ... + 41033.

It is an arithmetic number, because the mean of its divisors is an integer number (3572100).

Almost surely, 2^65122656 is an apocalyptic number.

It is an amenable number.

65122656 is an abundant number, since it is smaller than the sum of its proper divisors (106338144).

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

65122656 is a wasteful number, since it uses less digits than its factorization.

65122656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2043 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 65122656 is about 8069.8609653451. The cubic root of 65122656 is about 402.3253226586.

Subtracting 65122656 from its reverse (65622156), we obtain a triangular number (499500 = T₉₉₉).

It can be divided in two parts, 6 and 5122656, that multiplied together give a square (30735936 = 5544²).

The spelling of 65122656 in words is "sixty-five million, one hundred twenty-two thousand, six hundred fifty-six".