657764149 has 4 divisors (see below), whose sum is σ = 751730464. Its totient is φ = 563797836.

The previous prime is 657764131. The next prime is 657764161. The reversal of 657764149 is 941467756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 657764149 - 2⁵ = 657764117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657764749) 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 3 ways as a sum of consecutive naturals, for example, 46983147 + ... + 46983160.

It is an arithmetic number, because the mean of its divisors is an integer number (187932616).

Almost surely, 2^657764149 is an apocalyptic number.

It is an amenable number.

657764149 is a deficient number, since it is larger than the sum of its proper divisors (93966315).

657764149 is an equidigital number, since it uses as much as digits as its factorization.

657764149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93966314.

The product of its digits is 1270080, while the sum is 49.

The square root of 657764149 is about 25646.9130501119. The cubic root of 657764149 is about 869.6744935453.

The spelling of 657764149 in words is "six hundred fifty-seven million, seven hundred sixty-four thousand, one hundred forty-nine".