1662411564 has 72 divisors (see below), whose sum is σ = 4598197968. Its totient is φ = 502225920.

The previous prime is 1662411563. The next prime is 1662411587. The reversal of 1662411564 is 4651142661.

1662411564 is a `hidden beast` number, since 1 + 66 + 24 + 11 + 564 = 666.

It is a super-2 number, since 2×1662411564² = 5527224416241852192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1662411563) 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, 127224 + ... + 139680.

Almost surely, 2^1662411564 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 1662411564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2299098984).

1662411564 is an abundant number, since it is smaller than the sum of its proper divisors (2935786404).

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

1662411564 is a wasteful number, since it uses less digits than its factorization.

1662411564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815 (or 12810 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1662411564 is about 40772.6815895153. The cubic root of 1662411564 is about 1184.6212451877.

The spelling of 1662411564 in words is "one billion, six hundred sixty-two million, four hundred eleven thousand, five hundred sixty-four".