662405985 has 64 divisors (see below), whose sum is σ = 1230888960. Its totient is φ = 337590720.

The previous prime is 662405981. The next prime is 662406061. The reversal of 662405985 is 589504266.

It is not a de Polignac number, because 662405985 - 2² = 662405981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 662405985.

It is not an unprimeable number, because it can be changed into a prime (662405981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 346402 + ... + 348308.

It is an arithmetic number, because the mean of its divisors is an integer number (19232640).

Almost surely, 2^662405985 is an apocalyptic number.

It is an amenable number.

662405985 is a deficient number, since it is larger than the sum of its proper divisors (568482975).

662405985 is a wasteful number, since it uses less digits than its factorization.

662405985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035 (or 2029 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 662405985 is about 25737.2489788633. The cubic root of 662405985 is about 871.7154618485.

The spelling of 662405985 in words is "six hundred sixty-two million, four hundred five thousand, nine hundred eighty-five".