662566631 has 4 divisors (see below), whose sum is σ = 663157752. Its totient is φ = 661975512.

The previous prime is 662566603. The next prime is 662566633. The reversal of 662566631 is 136665266.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662566631 is a prime.

It is a super-2 number, since 2×662566631² = 877989081029380322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662566633) 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, 293876 + ... + 296121.

It is an arithmetic number, because the mean of its divisors is an integer number (165789438).

Almost surely, 2^662566631 is an apocalyptic number.

662566631 is a deficient number, since it is larger than the sum of its proper divisors (591121).

662566631 is a wasteful number, since it uses less digits than its factorization.

662566631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591120.

The product of its digits is 233280, while the sum is 41.

The square root of 662566631 is about 25740.3696748901. The cubic root of 662566631 is about 871.7859253236.

The spelling of 662566631 in words is "six hundred sixty-two million, five hundred sixty-six thousand, six hundred thirty-one".