664124245 has 8 divisors (see below), whose sum is σ = 797090616. Its totient is φ = 531205056.

The previous prime is 664124231. The next prime is 664124249. The reversal of 664124245 is 542421466.

It can be written as a sum of positive squares in 4 ways, for example, as 55860676 + 608263569 = 7474^2 + 24663^2 .

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 664124245 - 2⁷ = 664124117 is a prime.

It is a super-2 number, since 2×664124245² = 882122025593640050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664124245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664124249) 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, 39319 + ... + 53611.

It is an arithmetic number, because the mean of its divisors is an integer number (99636327).

Almost surely, 2^664124245 is an apocalyptic number.

It is an amenable number.

664124245 is a deficient number, since it is larger than the sum of its proper divisors (132966371).

664124245 is a wasteful number, since it uses less digits than its factorization.

664124245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23591.

The product of its digits is 46080, while the sum is 34.

The square root of 664124245 is about 25770.6081612367. The cubic root of 664124245 is about 872.4685451013.

The spelling of 664124245 in words is "six hundred sixty-four million, one hundred twenty-four thousand, two hundred forty-five".