657416676387 has 4 divisors (see below), whose sum is σ = 876555568520. Its totient is φ = 438277784256.

The previous prime is 657416676379. The next prime is 657416676461. The reversal of 657416676387 is 783676614756.

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

It is not a de Polignac number, because 657416676387 - 2³ = 657416676379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657416676307) 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, 109569446062 + ... + 109569446067.

It is an arithmetic number, because the mean of its divisors is an integer number (219138892130).

Almost surely, 2^657416676387 is an apocalyptic number.

657416676387 is a deficient number, since it is larger than the sum of its proper divisors (219138892133).

657416676387 is a wasteful number, since it uses less digits than its factorization.

657416676387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219138892132.

The product of its digits is 213373440, while the sum is 66.

The spelling of 657416676387 in words is "six hundred fifty-seven billion, four hundred sixteen million, six hundred seventy-six thousand, three hundred eighty-seven".