618666851 has 8 divisors (see below), whose sum is σ = 675345600. Its totient is φ = 562060840.

The previous prime is 618666817. The next prime is 618666883. The reversal of 618666851 is 158666816.

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

It is not a de Polignac number, because 618666851 - 2⁶ = 618666787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 618666796 and 618666805.

It is not an unprimeable number, because it can be changed into a prime (618666551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440 + ... + 35178.

It is an arithmetic number, because the mean of its divisors is an integer number (84418200).

Almost surely, 2^618666851 is an apocalyptic number.

618666851 is a deficient number, since it is larger than the sum of its proper divisors (56678749).

618666851 is a wasteful number, since it uses less digits than its factorization.

618666851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36369.

The product of its digits is 414720, while the sum is 47.

The square root of 618666851 is about 24873.0145137255. The cubic root of 618666851 is about 852.0902884141.

It can be divided in two parts, 6186 and 66851, that added together give a palindrome (73037).

The spelling of 618666851 in words is "six hundred eighteen million, six hundred sixty-six thousand, eight hundred fifty-one".