1331664654 has 16 divisors (see below), whose sum is σ = 2669485392. Its totient is φ = 442862208.

The previous prime is 1331664641. The next prime is 1331664661. The reversal of 1331664654 is 4564661331.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253689 + ... + 258884.

It is an arithmetic number, because the mean of its divisors is an integer number (166842837).

Almost surely, 2^1331664654 is an apocalyptic number.

1331664654 is an abundant number, since it is smaller than the sum of its proper divisors (1337820738).

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

1331664654 is a wasteful number, since it uses less digits than its factorization.

1331664654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513011.

The product of its digits is 155520, while the sum is 39.

The square root of 1331664654 is about 36491.9806806920. The cubic root of 1331664654 is about 1100.1830698060.

The spelling of 1331664654 in words is "one billion, three hundred thirty-one million, six hundred sixty-four thousand, six hundred fifty-four".