1663530654 has 64 divisors (see below), whose sum is σ = 3505420800. Its totient is φ = 525581952.

The previous prime is 1663530653. The next prime is 1663530691. The reversal of 1663530654 is 4560353661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663530653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3306967 + ... + 3307469.

It is an arithmetic number, because the mean of its divisors is an integer number (54772200).

Almost surely, 2^1663530654 is an apocalyptic number.

1663530654 is an abundant number, since it is smaller than the sum of its proper divisors (1841890146).

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

1663530654 is a wasteful number, since it uses less digits than its factorization.

1663530654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849.

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 1663530654 is about 40786.4028077986. The cubic root of 1663530654 is about 1184.8870037709.

The spelling of 1663530654 in words is "one billion, six hundred sixty-three million, five hundred thirty thousand, six hundred fifty-four".