667615375215557 has 8 divisors (see below), whose sum is σ = 674498691939072. Its totient is φ = 660732072451200.

The previous prime is 667615375215521. The next prime is 667615375215589. The reversal of 667615375215557 is 755512573516766.

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

It is a cyclic number.

It is not a de Polignac number, because 667615375215557 - 2¹⁶ = 667615375150021 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 (667615375215857) 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, 112390082 + ... + 118181052.

It is an arithmetic number, because the mean of its divisors is an integer number (84312336492384).

Almost surely, 2^{667615375215557} is an apocalyptic number.

It is an amenable number.

667615375215557 is a deficient number, since it is larger than the sum of its proper divisors (6883316723515).

667615375215557 is a wasteful number, since it uses less digits than its factorization.

667615375215557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6979579.

The product of its digits is 1389150000, while the sum is 71.

The spelling of 667615375215557 in words is "six hundred sixty-seven trillion, six hundred fifteen billion, three hundred seventy-five million, two hundred fifteen thousand, five hundred fifty-seven".