662236591 has 4 divisors (see below), whose sum is σ = 673461000. Its totient is φ = 651012184.

The previous prime is 662236577. The next prime is 662236651. The reversal of 662236591 is 195632266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195632266 = 2 ⋅97816133.

It is a cyclic number.

It is not a de Polignac number, because 662236591 - 2⁵ = 662236559 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662236501) 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, 5612116 + ... + 5612233.

It is an arithmetic number, because the mean of its divisors is an integer number (168365250).

Almost surely, 2^662236591 is an apocalyptic number.

662236591 is a deficient number, since it is larger than the sum of its proper divisors (11224409).

662236591 is a wasteful number, since it uses less digits than its factorization.

662236591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11224408.

The product of its digits is 116640, while the sum is 40.

The square root of 662236591 is about 25733.9579349932. The cubic root of 662236591 is about 871.6411489340.

The spelling of 662236591 in words is "six hundred sixty-two million, two hundred thirty-six thousand, five hundred ninety-one".