65633487 has 4 divisors (see below), whose sum is σ = 87511320. Its totient is φ = 43755656.

The previous prime is 65633483. The next prime is 65633501. The reversal of 65633487 is 78433656.

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 65633487 - 2² = 65633483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65633483) 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, 10938912 + ... + 10938917.

It is an arithmetic number, because the mean of its divisors is an integer number (21877830).

Almost surely, 2^65633487 is an apocalyptic number.

65633487 is a deficient number, since it is larger than the sum of its proper divisors (21877833).

65633487 is a wasteful number, since it uses less digits than its factorization.

65633487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21877832.

The product of its digits is 362880, while the sum is 42.

The square root of 65633487 is about 8101.4496850872. The cubic root of 65633487 is about 403.3745489076.

It can be divided in two parts, 656 and 33487, that added together give a palindrome (34143).

The spelling of 65633487 in words is "sixty-five million, six hundred thirty-three thousand, four hundred eighty-seven".