65649133 has 4 divisors (see below), whose sum is σ = 71617248. Its totient is φ = 59681020.

The previous prime is 65649113. The next prime is 65649151. The reversal of 65649133 is 33194656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65649133 - 2⁹ = 65648621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65649092 and 65649101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65649113) 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, 2984041 + ... + 2984062.

It is an arithmetic number, because the mean of its divisors is an integer number (17904312).

Almost surely, 2^65649133 is an apocalyptic number.

It is an amenable number.

65649133 is a deficient number, since it is larger than the sum of its proper divisors (5968115).

65649133 is a wasteful number, since it uses less digits than its factorization.

65649133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968114.

The product of its digits is 58320, while the sum is 37.

The square root of 65649133 is about 8102.4152571934. The cubic root of 65649133 is about 403.4065990955.

The spelling of 65649133 in words is "sixty-five million, six hundred forty-nine thousand, one hundred thirty-three".