1662805644 has 24 divisors (see below), whose sum is σ = 3881813040. Its totient is φ = 553992384.

The previous prime is 1662805591. The next prime is 1662805679. The reversal of 1662805644 is 4465082661.

It is a junction number, because it is equal to n+sod(n) for n = 1662805596 and 1662805605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8659 + ... + 58314.

It is an arithmetic number, because the mean of its divisors is an integer number (161742210).

Almost surely, 2^1662805644 is an apocalyptic number.

It is an amenable number.

1662805644 is an abundant number, since it is smaller than the sum of its proper divisors (2219007396).

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

1662805644 is a wasteful number, since it uses less digits than its factorization.

1662805644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69049 (or 69047 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 1662805644 is about 40777.5139507057. The cubic root of 1662805644 is about 1184.7148438823.

The spelling of 1662805644 in words is "one billion, six hundred sixty-two million, eight hundred five thousand, six hundred forty-four".