664455545 has 8 divisors (see below), whose sum is σ = 858681096. Its totient is φ = 490674816.

The previous prime is 664455521. The next prime is 664455551. The reversal of 664455545 is 545554466.

It can be written as a sum of positive squares in 4 ways, for example, as 122124601 + 542330944 = 11051^2 + 23288^2 .

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 664455545 - 2¹⁴ = 664439161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664455496 and 664455505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5111132 + ... + 5111261.

It is an arithmetic number, because the mean of its divisors is an integer number (107335137).

Almost surely, 2^664455545 is an apocalyptic number.

664455545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

664455545 is a deficient number, since it is larger than the sum of its proper divisors (194225551).

664455545 is a wasteful number, since it uses less digits than its factorization.

664455545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222411.

The product of its digits is 1440000, while the sum is 44.

The square root of 664455545 is about 25777.0352251767. The cubic root of 664455545 is about 872.6135986713.

The spelling of 664455545 in words is "six hundred sixty-four million, four hundred fifty-five thousand, five hundred forty-five".