1662465440 has 24 divisors (see below), whose sum is σ = 3927574980. Its totient is φ = 664986112.

The previous prime is 1662465403. The next prime is 1662465481. The reversal of 1662465440 is 445642661.

It can be written as a sum of positive squares in 2 ways, for example, as 1599040144 + 63425296 = 39988^2 + 7964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1662465394 and 1662465403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5195045 + ... + 5195364.

Almost surely, 2^1662465440 is an apocalyptic number.

1662465440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662465440 is an abundant number, since it is smaller than the sum of its proper divisors (2265109540).

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

1662465440 is a wasteful number, since it uses less digits than its factorization.

1662465440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390424 (or 10390416 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 1662465440 is about 40773.3422716363. The cubic root of 1662465440 is about 1184.6340422523.

The spelling of 1662465440 in words is "one billion, six hundred sixty-two million, four hundred sixty-five thousand, four hundred forty".