66284288428 has 12 divisors (see below), whose sum is σ = 116025971040. Its totient is φ = 33134010992.

The previous prime is 66284288387. The next prime is 66284288453. The reversal of 66284288428 is 82488248266.

It is a super-2 number, since 2×66284288428² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014951 + ... + 2047582.

It is an arithmetic number, because the mean of its divisors is an integer number (9668830920).

Almost surely, 2^66284288428 is an apocalyptic number.

It is an amenable number.

66284288428 is a deficient number, since it is larger than the sum of its proper divisors (49741682612).

66284288428 is a wasteful number, since it uses less digits than its factorization.

66284288428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066616 (or 4066614 counting only the distinct ones).

The product of its digits is 18874368, while the sum is 58.

The spelling of 66284288428 in words is "sixty-six billion, two hundred eighty-four million, two hundred eighty-eight thousand, four hundred twenty-eight".