1662355020 has 48 divisors (see below), whose sum is σ = 4664233728. Its totient is φ = 442376640.

The previous prime is 1662355003. The next prime is 1662355027. The reversal of 1662355020 is 205532661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1662355027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775 + ... + 57665.

It is an arithmetic number, because the mean of its divisors is an integer number (97171536).

Almost surely, 2^1662355020 is an apocalyptic number.

1662355020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662355020 is an abundant number, since it is smaller than the sum of its proper divisors (3001878708).

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

1662355020 is a wasteful number, since it uses less digits than its factorization.

1662355020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57390 (or 57388 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1662355020 is about 40771.9881781598. The cubic root of 1662355020 is about 1184.6078141007.

Adding to 1662355020 its reverse (205532661), we get a palindrome (1867887681).

The spelling of 1662355020 in words is "one billion, six hundred sixty-two million, three hundred fifty-five thousand, twenty".