1662521124 has 72 divisors (see below), whose sum is σ = 4272679264. Its totient is φ = 502761600.

The previous prime is 1662521123. The next prime is 1662521141. The reversal of 1662521124 is 4211252661.

It is a junction number, because it is equal to n+sod(n) for n = 1662521091 and 1662521100.

It is not an unprimeable number, because it can be changed into a prime (1662521123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1002504 + ... + 1004160.

Almost surely, 2^1662521124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662521124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136339632).

1662521124 is an abundant number, since it is smaller than the sum of its proper divisors (2610158140).

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

1662521124 is a wasteful number, since it uses less digits than its factorization.

1662521124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377 (or 2364 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 1662521124 is about 40774.0251140355. The cubic root of 1662521124 is about 1184.6472684773.

Adding to 1662521124 its reverse (4211252661), we get a palindrome (5873773785).

The spelling of 1662521124 in words is "one billion, six hundred sixty-two million, five hundred twenty-one thousand, one hundred twenty-four".