66428053288 has 16 divisors (see below), whose sum is σ = 126902649780. Its totient is φ = 32587346688.

The previous prime is 66428053277. The next prime is 66428053301. The reversal of 66428053288 is 88235082466.

It can be written as a sum of positive squares in 2 ways, for example, as 65822007364 + 606045924 = 256558^2 + 24618^2 .

It is a super-2 number, since 2×66428053288² (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, 78334545 + ... + 78335392.

Almost surely, 2^66428053288 is an apocalyptic number.

It is an amenable number.

66428053288 is a deficient number, since it is larger than the sum of its proper divisors (60474596492).

66428053288 is a wasteful number, since it uses less digits than its factorization.

66428053288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156669996 (or 156669992 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 52.

The spelling of 66428053288 in words is "sixty-six billion, four hundred twenty-eight million, fifty-three thousand, two hundred eighty-eight".