66862540 has 12 divisors (see below), whose sum is σ = 140411376. Its totient is φ = 26745008.

The previous prime is 66862489. The next prime is 66862573. The reversal of 66862540 is 4526866.

It is a self number, because there is not a number n which added to its sum of digits gives 66862540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671544 + ... + 1671583.

It is an arithmetic number, because the mean of its divisors is an integer number (11700948).

Almost surely, 2^66862540 is an apocalyptic number.

It is an amenable number.

66862540 is an abundant number, since it is smaller than the sum of its proper divisors (73548836).

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

66862540 is a wasteful number, since it uses less digits than its factorization.

66862540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343136 (or 3343134 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 66862540 is about 8176.9517547800. The cubic root of 66862540 is about 405.8768584782.

The spelling of 66862540 in words is "sixty-six million, eight hundred sixty-two thousand, five hundred forty".