66606672452 has 24 divisors (see below), whose sum is σ = 123495249024. Its totient is φ = 31324760192.

The previous prime is 66606672439. The next prime is 66606672481. The reversal of 66606672452 is 25427660666.

It is a self number, because there is not a number n which added to its sum of digits gives 66606672452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195488 + ... + 414039.

It is an arithmetic number, because the mean of its divisors is an integer number (5145635376).

Almost surely, 2^66606672452 is an apocalyptic number.

It is an amenable number.

66606672452 is a deficient number, since it is larger than the sum of its proper divisors (56888576572).

66606672452 is a wasteful number, since it uses less digits than its factorization.

66606672452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611155 (or 611153 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 66606672452 in words is "sixty-six billion, six hundred six million, six hundred seventy-two thousand, four hundred fifty-two".