65721260 has 24 divisors (see below), whose sum is σ = 150561936. Its totient is φ = 23898560.

The previous prime is 65721251. The next prime is 65721263. The reversal of 65721260 is 6212756.

It is not an unprimeable number, because it can be changed into a prime (65721263) 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, 149147 + ... + 149586.

It is an arithmetic number, because the mean of its divisors is an integer number (6273414).

Almost surely, 2^65721260 is an apocalyptic number.

It is an amenable number.

65721260 is an abundant number, since it is smaller than the sum of its proper divisors (84840676).

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

65721260 is a wasteful number, since it uses less digits than its factorization.

65721260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298753 (or 298751 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 65721260 is about 8106.8649920916. The cubic root of 65721260 is about 403.5542824798.

The spelling of 65721260 in words is "sixty-five million, seven hundred twenty-one thousand, two hundred sixty".