66165070 has 16 divisors (see below), whose sum is σ = 119483280. Its totient is φ = 26380224.

The previous prime is 66165059. The next prime is 66165079. The reversal of 66165070 is 7056166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66165079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7440 + ... + 13699.

It is an arithmetic number, because the mean of its divisors is an integer number (7467705).

Almost surely, 2^66165070 is an apocalyptic number.

66165070 is a deficient number, since it is larger than the sum of its proper divisors (53318210).

66165070 is a wasteful number, since it uses less digits than its factorization.

66165070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21459.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 66165070 is about 8134.1914164839. The cubic root of 66165070 is about 404.4606344458.

It can be divided in two parts, 661650 and 70, that multiplied together give a triangular number (46315500 = T₉₆₂₄).

The spelling of 66165070 in words is "sixty-six million, one hundred sixty-five thousand, seventy".