65791616 has 32 divisors (see below), whose sum is σ = 142987680. Its totient is φ = 29904640.

The previous prime is 65791601. The next prime is 65791631. The reversal of 65791616 is 61619756.

It is an interprime number because it is at equal distance from previous prime (65791601) and next prime (65791631).

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21956 + ... + 24771.

It is an arithmetic number, because the mean of its divisors is an integer number (4468365).

Almost surely, 2^65791616 is an apocalyptic number.

It is an amenable number.

65791616 is an abundant number, since it is smaller than the sum of its proper divisors (77196064).

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

65791616 is a wasteful number, since it uses less digits than its factorization.

65791616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46752 (or 46740 counting only the distinct ones).

The product of its digits is 68040, while the sum is 41.

The square root of 65791616 is about 8111.2031166776. The cubic root of 65791616 is about 403.6982355909.

The spelling of 65791616 in words is "sixty-five million, seven hundred ninety-one thousand, six hundred sixteen".