66106870 has 8 divisors (see below), whose sum is σ = 118992384. Its totient is φ = 26442744.

The previous prime is 66106813. The next prime is 66106877. The reversal of 66106870 is 7860166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66106870² = 8740236522393800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66106877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3305334 + ... + 3305353.

It is an arithmetic number, because the mean of its divisors is an integer number (14874048).

Almost surely, 2^66106870 is an apocalyptic number.

66106870 is a deficient number, since it is larger than the sum of its proper divisors (52885514).

66106870 is a wasteful number, since it uses less digits than its factorization.

66106870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610694.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 66106870 is about 8130.6131380112. The cubic root of 66106870 is about 404.3420093452.

The spelling of 66106870 in words is "sixty-six million, one hundred six thousand, eight hundred seventy".