65416649 has 4 divisors (see below), whose sum is σ = 65595264. Its totient is φ = 65238036.

The previous prime is 65416643. The next prime is 65416651. The reversal of 65416649 is 94661456.

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 65416649 - 2²⁴ = 48639433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65416643) 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, 88757 + ... + 89490.

It is an arithmetic number, because the mean of its divisors is an integer number (16398816).

Almost surely, 2^65416649 is an apocalyptic number.

It is an amenable number.

65416649 is a deficient number, since it is larger than the sum of its proper divisors (178615).

65416649 is a wasteful number, since it uses less digits than its factorization.

65416649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178614.

The product of its digits is 155520, while the sum is 41.

The square root of 65416649 is about 8088.0559468886. The cubic root of 65416649 is about 402.9298397853.

The spelling of 65416649 in words is "sixty-five million, four hundred sixteen thousand, six hundred forty-nine".