657600745 has 4 divisors (see below), whose sum is σ = 789120900. Its totient is φ = 526080592.

The previous prime is 657600709. The next prime is 657600761. The reversal of 657600745 is 547006756.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76405081 + 581195664 = 8741^2 + 24108^2 .

It is a cyclic number.

It is not a de Polignac number, because 657600745 - 2⁹ = 657600233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 657600698 and 657600707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65760070 + ... + 65760079.

It is an arithmetic number, because the mean of its divisors is an integer number (197280225).

Almost surely, 2^657600745 is an apocalyptic number.

It is an amenable number.

657600745 is a deficient number, since it is larger than the sum of its proper divisors (131520155).

657600745 is a wasteful number, since it uses less digits than its factorization.

657600745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131520154.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 657600745 is about 25643.7272056930. The cubic root of 657600745 is about 869.6024717523.

The spelling of 657600745 in words is "six hundred fifty-seven million, six hundred thousand, seven hundred forty-five".