1663240670 has 32 divisors (see below), whose sum is σ = 3684719808. Its totient is φ = 526387968.

The previous prime is 1663240669. The next prime is 1663240673. The reversal of 1663240670 is 760423661.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1663240670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663240673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 912959 + ... + 914778.

It is an arithmetic number, because the mean of its divisors is an integer number (115147494).

Almost surely, 2^1663240670 is an apocalyptic number.

1663240670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663240670 is an abundant number, since it is smaller than the sum of its proper divisors (2021479138).

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

1663240670 is a wasteful number, since it uses less digits than its factorization.

1663240670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827764.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 1663240670 is about 40782.8477426479. The cubic root of 1663240670 is about 1184.8181505682.

The spelling of 1663240670 in words is "one billion, six hundred sixty-three million, two hundred forty thousand, six hundred seventy".