66655070 has 16 divisors (see below), whose sum is σ = 120126240. Its totient is φ = 26629344.

The previous prime is 66655067. The next prime is 66655091. The reversal of 66655070 is 7055666.

It is a self number, because there is not a number n which added to its sum of digits gives 66655070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5564 + ... + 12816.

It is an arithmetic number, because the mean of its divisors is an integer number (7507890).

Almost surely, 2^66655070 is an apocalyptic number.

66655070 is a deficient number, since it is larger than the sum of its proper divisors (53471170).

66655070 is a wasteful number, since it uses less digits than its factorization.

66655070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8179.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 66655070 is about 8164.2556304908. The cubic root of 66655070 is about 405.4566205851.

The spelling of 66655070 in words is "sixty-six million, six hundred fifty-five thousand, seventy".