65733993 has 12 divisors (see below), whose sum is σ = 102253060. Its totient is φ = 40451616.

The previous prime is 65733989. The next prime is 65734003. The reversal of 65733993 is 39933756.

It can be written as a sum of positive squares in 2 ways, for example, as 16621929 + 49112064 = 4077^2 + 7008^2 .

It is not a de Polignac number, because 65733993 - 2² = 65733989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65733973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280798 + ... + 281031.

Almost surely, 2^65733993 is an apocalyptic number.

It is an amenable number.

65733993 is a deficient number, since it is larger than the sum of its proper divisors (36519067).

65733993 is a wasteful number, since it uses less digits than its factorization.

65733993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561848 (or 561845 counting only the distinct ones).

The product of its digits is 459270, while the sum is 45.

The square root of 65733993 is about 8107.6502761281. The cubic root of 65733993 is about 403.5803426662.

The spelling of 65733993 in words is "sixty-five million, seven hundred thirty-three thousand, nine hundred ninety-three".