65671940 has 24 divisors (see below), whose sum is σ = 138909120. Its totient is φ = 26078688.

The previous prime is 65671927. The next prime is 65671951. The reversal of 65671940 is 4917656.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 65671894 and 65671903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9032 + ... + 14591.

It is an arithmetic number, because the mean of its divisors is an integer number (5787880).

Almost surely, 2^65671940 is an apocalyptic number.

It is an amenable number.

65671940 is an abundant number, since it is smaller than the sum of its proper divisors (73237180).

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

65671940 is a wasteful number, since it uses less digits than its factorization.

65671940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23771 (or 23769 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 65671940 is about 8103.8225548194. The cubic root of 65671940 is about 403.4533091770.

The spelling of 65671940 in words is "sixty-five million, six hundred seventy-one thousand, nine hundred forty".