65604619 has 4 divisors (see below), whose sum is σ = 66842496. Its totient is φ = 64366744.

The previous prime is 65604613. The next prime is 65604661. The reversal of 65604619 is 91640656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65604619 - 2¹⁷ = 65473547 is a prime.

It is a super-2 number, since 2×65604619² = 8607932068270322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65604613) 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, 618859 + ... + 618964.

It is an arithmetic number, because the mean of its divisors is an integer number (16710624).

Almost surely, 2^65604619 is an apocalyptic number.

65604619 is a deficient number, since it is larger than the sum of its proper divisors (1237877).

65604619 is a wasteful number, since it uses less digits than its factorization.

65604619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237876.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 65604619 is about 8099.6678326954. The cubic root of 65604619 is about 403.3154006249.

The spelling of 65604619 in words is "sixty-five million, six hundred four thousand, six hundred nineteen".