657740441 has 8 divisors (see below), whose sum is σ = 673089480. Its totient is φ = 642500352.

The previous prime is 657740429. The next prime is 657740467. The reversal of 657740441 is 144047756.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 439321600 + 218418841 = 20960^2 + 14779^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657740441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 657740395 and 657740404.

It is not an unprimeable number, because it can be changed into a prime (657740401) 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, 14960 + ... + 39233.

It is an arithmetic number, because the mean of its divisors is an integer number (84136185).

Almost surely, 2^657740441 is an apocalyptic number.

It is an amenable number.

657740441 is a deficient number, since it is larger than the sum of its proper divisors (15349039).

657740441 is a wasteful number, since it uses less digits than its factorization.

657740441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54475.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 657740441 is about 25646.4508460722. The cubic root of 657740441 is about 869.6640447694.

The spelling of 657740441 in words is "six hundred fifty-seven million, seven hundred forty thousand, four hundred forty-one".