65220587 has 4 divisors (see below), whose sum is σ = 65513280. Its totient is φ = 64927896.

The previous prime is 65220563. The next prime is 65220599. The reversal of 65220587 is 78502256.

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 65220587 - 2⁶ = 65220523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65220557) 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, 146012 + ... + 146457.

It is an arithmetic number, because the mean of its divisors is an integer number (16378320).

Almost surely, 2^65220587 is an apocalyptic number.

65220587 is a deficient number, since it is larger than the sum of its proper divisors (292693).

65220587 is a wasteful number, since it uses less digits than its factorization.

65220587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292692.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 65220587 is about 8075.9263864897. The cubic root of 65220587 is about 402.5268929988.

The spelling of 65220587 in words is "sixty-five million, two hundred twenty thousand, five hundred eighty-seven".