1663064700 has 72 divisors (see below), whose sum is σ = 5249247360. Its totient is φ = 403166400.

The previous prime is 1663064693. The next prime is 1663064701. The reversal of 1663064700 is 74603661.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663064701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248680 + ... + 255279.

Almost surely, 2^1663064700 is an apocalyptic number.

1663064700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663064700 is an abundant number, since it is smaller than the sum of its proper divisors (3586182660).

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

1663064700 is a wasteful number, since it uses less digits than its factorization.

1663064700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503987 (or 503980 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 1663064700 is about 40780.6902835153. The cubic root of 1663064700 is about 1184.7763647127.

The spelling of 1663064700 in words is "one billion, six hundred sixty-three million, sixty-four thousand, seven hundred".