65480721 has 8 divisors (see below), whose sum is σ = 87765504. Its totient is φ = 43424880.

The previous prime is 65480717. The next prime is 65480741. The reversal of 65480721 is 12708456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65480721 - 2² = 65480717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65480741) 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, 56566 + ... + 57711.

It is an arithmetic number, because the mean of its divisors is an integer number (10970688).

Almost surely, 2^65480721 is an apocalyptic number.

It is an amenable number.

65480721 is a deficient number, since it is larger than the sum of its proper divisors (22284783).

65480721 is a wasteful number, since it uses less digits than its factorization.

65480721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114471.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 65480721 is about 8092.0158798658. The cubic root of 65480721 is about 403.0613460459.

The spelling of 65480721 in words is "sixty-five million, four hundred eighty thousand, seven hundred twenty-one".