657764045 has 8 divisors (see below), whose sum is σ = 814778880. Its totient is φ = 509236560.

The previous prime is 657764011. The next prime is 657764047. The reversal of 657764045 is 540467756.

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

It is a de Polignac number, because none of the positive numbers 2^k-657764045 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 657763987 and 657764005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657764047) by changing a digit.

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, 2121665 + ... + 2121974.

It is an arithmetic number, because the mean of its divisors is an integer number (101847360).

Almost surely, 2^657764045 is an apocalyptic number.

It is an amenable number.

657764045 is a deficient number, since it is larger than the sum of its proper divisors (157014835).

657764045 is a wasteful number, since it uses less digits than its factorization.

657764045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243675.

The product of its (nonzero) digits is 705600, while the sum is 44.

The square root of 657764045 is about 25646.9110225774. The cubic root of 657764045 is about 869.6744477102.

The spelling of 657764045 in words is "six hundred fifty-seven million, seven hundred sixty-four thousand, forty-five".