65993740 has 12 divisors (see below), whose sum is σ = 138586896. Its totient is φ = 26397488.

The previous prime is 65993731. The next prime is 65993743. The reversal of 65993740 is 4739956.

It is not an unprimeable number, because it can be changed into a prime (65993743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649824 + ... + 1649863.

It is an arithmetic number, because the mean of its divisors is an integer number (11548908).

Almost surely, 2^65993740 is an apocalyptic number.

It is an amenable number.

65993740 is an abundant number, since it is smaller than the sum of its proper divisors (72593156).

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

65993740 is a wasteful number, since it uses less digits than its factorization.

65993740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299696 (or 3299694 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 65993740 is about 8123.6531191330. The cubic root of 65993740 is about 404.1112248085. Note that the first 3 decimals are identical.

The spelling of 65993740 in words is "sixty-five million, nine hundred ninety-three thousand, seven hundred forty".