66001270 has 16 divisors (see below), whose sum is σ = 118898928. Its totient is φ = 26379040.

The previous prime is 66001249. The next prime is 66001277. The reversal of 66001270 is 7210066.

It is a super-2 number, since 2×66001270² = 8712335283225800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66001277) 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 7 ways as a sum of consecutive naturals, for example, 17340 + ... + 20800.

It is an arithmetic number, because the mean of its divisors is an integer number (7431183).

Almost surely, 2^66001270 is an apocalyptic number.

66001270 is a deficient number, since it is larger than the sum of its proper divisors (52897658).

66001270 is a wasteful number, since it uses less digits than its factorization.

66001270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5375.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 66001270 is about 8124.1165673567. The cubic root of 66001270 is about 404.1265941541.

The spelling of 66001270 in words is "sixty-six million, one thousand, two hundred seventy".