616666604457 has 16 divisors (see below), whose sum is σ = 834529476672. Its totient is φ = 404957921280.

The previous prime is 616666604429. The next prime is 616666604471. The reversal of 616666604457 is 754406666616.

It is not a de Polignac number, because 616666604457 - 2²² = 616662410153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616666604397 and 616666604406.

It is not an unprimeable number, because it can be changed into a prime (616666604497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6176857 + ... + 6275897.

It is an arithmetic number, because the mean of its divisors is an integer number (52158092292).

Almost surely, 2^616666604457 is an apocalyptic number.

616666604457 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

616666604457 is a deficient number, since it is larger than the sum of its proper divisors (217862872215).

616666604457 is a wasteful number, since it uses less digits than its factorization.

616666604457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130088.

The product of its (nonzero) digits is 26127360, while the sum is 57.

The spelling of 616666604457 in words is "six hundred sixteen billion, six hundred sixty-six million, six hundred four thousand, four hundred fifty-seven".