657106145 has 4 divisors (see below), whose sum is σ = 788527380. Its totient is φ = 525684912.

The previous prime is 657106141. The next prime is 657106147. The reversal of 657106145 is 541601756.

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 351975121 + 305131024 = 18761^2 + 17468^2 .

It is a cyclic number.

It is not a de Polignac number, because 657106145 - 2² = 657106141 is a prime.

It is a super-2 number, since 2×657106145² = 863576971593522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (657106141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65710610 + ... + 65710619.

It is an arithmetic number, because the mean of its divisors is an integer number (197131845).

Almost surely, 2^657106145 is an apocalyptic number.

It is an amenable number.

657106145 is a deficient number, since it is larger than the sum of its proper divisors (131421235).

657106145 is a wasteful number, since it uses less digits than its factorization.

657106145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131421234.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 657106145 is about 25634.0817077577. The cubic root of 657106145 is about 869.3843995850.

The spelling of 657106145 in words is "six hundred fifty-seven million, one hundred six thousand, one hundred forty-five".