616670620557 has 8 divisors (see below), whose sum is σ = 822243405984. Its totient is φ = 411105791088.

The previous prime is 616670620519. The next prime is 616670620627. The reversal of 616670620557 is 755026076616.

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

It is not a de Polignac number, because 616670620557 - 2¹⁰ = 616670619533 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616670620157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805718 + ... + 2119895.

It is an arithmetic number, because the mean of its divisors is an integer number (102780425748).

Almost surely, 2^616670620557 is an apocalyptic number.

It is an amenable number.

616670620557 is a deficient number, since it is larger than the sum of its proper divisors (205572785427).

616670620557 is a wasteful number, since it uses less digits than its factorization.

616670620557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977979.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 616670620557 in words is "six hundred sixteen billion, six hundred seventy million, six hundred twenty thousand, five hundred fifty-seven".