1662265540 has 48 divisors (see below), whose sum is σ = 3957145920. Its totient is φ = 581454720.

The previous prime is 1662265537. The next prime is 1662265543. The reversal of 1662265540 is 455622661.

It is an interprime number because it is at equal distance from previous prime (1662265537) and next prime (1662265543).

It is a self number, because there is not a number n which added to its sum of digits gives 1662265540.

It is not an unprimeable number, because it can be changed into a prime (1662265543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163306 + ... + 173185.

It is an arithmetic number, because the mean of its divisors is an integer number (82440540).

Almost surely, 2^1662265540 is an apocalyptic number.

1662265540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662265540 is an abundant number, since it is smaller than the sum of its proper divisors (2294880380).

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

1662265540 is a wasteful number, since it uses less digits than its factorization.

1662265540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336532 (or 336530 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 1662265540 is about 40770.8908413834. The cubic root of 1662265540 is about 1184.5865589921.

The spelling of 1662265540 in words is "one billion, six hundred sixty-two million, two hundred sixty-five thousand, five hundred forty".