65628501 has 4 divisors (see below), whose sum is σ = 87504672. Its totient is φ = 43752332.

The previous prime is 65628481. The next prime is 65628509. The reversal of 65628501 is 10582656.

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 65628501 - 2¹¹ = 65626453 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65628509) 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, 10938081 + ... + 10938086.

It is an arithmetic number, because the mean of its divisors is an integer number (21876168).

Almost surely, 2^65628501 is an apocalyptic number.

It is an amenable number.

65628501 is a deficient number, since it is larger than the sum of its proper divisors (21876171).

65628501 is a wasteful number, since it uses less digits than its factorization.

65628501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21876170.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 65628501 is about 8101.1419565392. The cubic root of 65628501 is about 403.3643342214.

The spelling of 65628501 in words is "sixty-five million, six hundred twenty-eight thousand, five hundred one".