662945521 has 8 divisors (see below), whose sum is σ = 764603840. Its totient is φ = 563025168.

The previous prime is 662945519. The next prime is 662945527. The reversal of 662945521 is 125549266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 662945521 - 2¹ = 662945519 is a prime.

It is a super-2 number, since 2×662945521² = 878993527627922882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (662945527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433671 + ... + 435196.

It is an arithmetic number, because the mean of its divisors is an integer number (95575480).

Almost surely, 2^662945521 is an apocalyptic number.

It is an amenable number.

662945521 is a deficient number, since it is larger than the sum of its proper divisors (101658319).

662945521 is a wasteful number, since it uses less digits than its factorization.

662945521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868983.

The product of its digits is 129600, while the sum is 40.

The square root of 662945521 is about 25747.7284629149. The cubic root of 662945521 is about 871.9520711424.

The spelling of 662945521 in words is "six hundred sixty-two million, nine hundred forty-five thousand, five hundred twenty-one".