618666534 has 24 divisors (see below), whose sum is σ = 1341990000. Its totient is φ = 205984368.

The previous prime is 618666527. The next prime is 618666551. The reversal of 618666534 is 435666816.

It is a self number, because there is not a number n which added to its sum of digits gives 618666534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3409 + ... + 35340.

It is an arithmetic number, because the mean of its divisors is an integer number (55916250).

Almost surely, 2^618666534 is an apocalyptic number.

618666534 is an abundant number, since it is smaller than the sum of its proper divisors (723323466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618666534 is a wasteful number, since it uses less digits than its factorization.

618666534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39644 (or 39641 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 618666534 is about 24873.0081413568. The cubic root of 618666534 is about 852.0901428793.

The spelling of 618666534 in words is "six hundred eighteen million, six hundred sixty-six thousand, five hundred thirty-four".