65480640 has 56 divisors (see below), whose sum is σ = 207904080. Its totient is φ = 17461248.

The previous prime is 65480627. The next prime is 65480663. The reversal of 65480640 is 4608456.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33145 + ... + 35064.

Almost surely, 2^65480640 is an apocalyptic number.

65480640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65480640 is an abundant number, since it is smaller than the sum of its proper divisors (142423440).

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

65480640 is a wasteful number, since it uses less digits than its factorization.

65480640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68229 (or 68219 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 65480640 is about 8092.0108749309. The cubic root of 65480640 is about 403.0611798495.

The spelling of 65480640 in words is "sixty-five million, four hundred eighty thousand, six hundred forty".