65670440 has 32 divisors (see below), whose sum is σ = 161192160. Its totient is φ = 23880000.

The previous prime is 65670427. The next prime is 65670461. The reversal of 65670440 is 4407656.

It is a junction number, because it is equal to n+sod(n) for n = 65670397 and 65670406.

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, 74186 + ... + 75065.

It is an arithmetic number, because the mean of its divisors is an integer number (5037255).

Almost surely, 2^65670440 is an apocalyptic number.

It is an amenable number.

65670440 is an abundant number, since it is smaller than the sum of its proper divisors (95521720).

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

65670440 is a wasteful number, since it uses less digits than its factorization.

65670440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149273 (or 149269 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 65670440 is about 8103.7300053741. The cubic root of 65670440 is about 403.4502374208.

The spelling of 65670440 in words is "sixty-five million, six hundred seventy thousand, four hundred forty".