66556076 has 6 divisors (see below), whose sum is σ = 116473140. Its totient is φ = 33278036.

The previous prime is 66556067. The next prime is 66556099. The reversal of 66556076 is 67065566.

It is a super-2 number, since 2×66556076² = 8859422505035552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319506 + ... + 8319513.

It is an arithmetic number, because the mean of its divisors is an integer number (19412190).

Almost surely, 2^66556076 is an apocalyptic number.

It is an amenable number.

66556076 is a deficient number, since it is larger than the sum of its proper divisors (49917064).

66556076 is a wasteful number, since it uses less digits than its factorization.

66556076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16639023 (or 16639021 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 66556076 is about 8158.1907307932. The cubic root of 66556076 is about 405.2557973541.

The spelling of 66556076 in words is "sixty-six million, five hundred fifty-six thousand, seventy-six".