662563980 has 144 divisors (see below), whose sum is σ = 2186184000. Its totient is φ = 161450496.

The previous prime is 662563973. The next prime is 662563981. The reversal of 662563980 is 89365266.

It is a happy number.

662563980 is a `hidden beast` number, since 6 + 6 + 2 + 5 + 639 + 8 + 0 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (662563981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 239646 + ... + 242394.

Almost surely, 2^662563980 is an apocalyptic number.

662563980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662563980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093092000).

662563980 is an abundant number, since it is smaller than the sum of its proper divisors (1523620020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

662563980 is a wasteful number, since it uses less digits than its factorization.

662563980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880 (or 2875 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 662563980 is about 25740.3181798516. The cubic root of 662563980 is about 871.7847626191.

The spelling of 662563980 in words is "six hundred sixty-two million, five hundred sixty-three thousand, nine hundred eighty".