1663425770 has 16 divisors (see below), whose sum is σ = 2996925480. Its totient is φ = 664757184.

The previous prime is 1663425769. The next prime is 1663425773. The reversal of 1663425770 is 775243661.

It can be written as a sum of positive squares in 4 ways, for example, as 1627557649 + 35868121 = 40343^2 + 5989^2 .

It is not an unprimeable number, because it can be changed into a prime (1663425773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65165 + ... + 87024.

Almost surely, 2^1663425770 is an apocalyptic number.

1663425770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663425770 is a deficient number, since it is larger than the sum of its proper divisors (1333499710).

1663425770 is a wasteful number, since it uses less digits than its factorization.

1663425770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153289.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 1663425770 is about 40785.1170158920. The cubic root of 1663425770 is about 1184.8621012541.

The spelling of 1663425770 in words is "one billion, six hundred sixty-three million, four hundred twenty-five thousand, seven hundred seventy".