65627993 has 4 divisors (see below), whose sum is σ = 68481408. Its totient is φ = 62774580.

The previous prime is 65627971. The next prime is 65627999. The reversal of 65627993 is 39972656.

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 65627993 - 2²⁴ = 48850777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65627999) 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, 1426673 + ... + 1426718.

It is an arithmetic number, because the mean of its divisors is an integer number (17120352).

Almost surely, 2^65627993 is an apocalyptic number.

It is an amenable number.

65627993 is a deficient number, since it is larger than the sum of its proper divisors (2853415).

65627993 is a wasteful number, since it uses less digits than its factorization.

65627993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853414.

The product of its digits is 612360, while the sum is 47.

The square root of 65627993 is about 8101.1106028742. The cubic root of 65627993 is about 403.3632934662.

The spelling of 65627993 in words is "sixty-five million, six hundred twenty-seven thousand, nine hundred ninety-three".