664054543 has 8 divisors (see below), whose sum is σ = 684190800. Its totient is φ = 644200128.

The previous prime is 664054483. The next prime is 664054553. The reversal of 664054543 is 345450466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664054543 - 2¹³ = 664046351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664054553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65673 + ... + 75106.

It is an arithmetic number, because the mean of its divisors is an integer number (85523850).

Almost surely, 2^664054543 is an apocalyptic number.

664054543 is a deficient number, since it is larger than the sum of its proper divisors (20136257).

664054543 is a wasteful number, since it uses less digits than its factorization.

664054543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140921.

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 664054543 is about 25769.2557711704. The cubic root of 664054543 is about 872.4380212294.

The spelling of 664054543 in words is "six hundred sixty-four million, fifty-four thousand, five hundred forty-three".