1662011560 has 128 divisors (see below), whose sum is σ = 4164048000. Its totient is φ = 592000000.

The previous prime is 1662011539. The next prime is 1662011623. The reversal of 1662011560 is 651102661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6621435 + ... + 6621685.

It is an arithmetic number, because the mean of its divisors is an integer number (32531625).

Almost surely, 2^1662011560 is an apocalyptic number.

1662011560 is a gapful number since it is divisible by the number (10) 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 1662011560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2082024000).

1662011560 is an abundant number, since it is smaller than the sum of its proper divisors (2502036440).

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

1662011560 is a wasteful number, since it uses less digits than its factorization.

1662011560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1662011560 is about 40767.7760001695. The cubic root of 1662011560 is about 1184.5262243442.

It can be divided in two parts, 166201 and 1560, that added together give a palindrome (167761).

The spelling of 1662011560 in words is "one billion, six hundred sixty-two million, eleven thousand, five hundred sixty".