1663654630 has 128 divisors (see below), whose sum is σ = 3661562880. Its totient is φ = 537039360.

The previous prime is 1663654627. The next prime is 1663654633. The reversal of 1663654630 is 364563661.

It is an interprime number because it is at equal distance from previous prime (1663654627) and next prime (1663654633).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663654633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2547384 + ... + 2548036.

It is an arithmetic number, because the mean of its divisors is an integer number (28605960).

Almost surely, 2^1663654630 is an apocalyptic number.

1663654630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663654630 is an abundant number, since it is smaller than the sum of its proper divisors (1997908250).

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

1663654630 is a wasteful number, since it uses less digits than its factorization.

1663654630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 1663654630 is about 40787.9225997108. The cubic root of 1663654630 is about 1184.9164379349.

The spelling of 1663654630 in words is "one billion, six hundred sixty-three million, six hundred fifty-four thousand, six hundred thirty".