66006546 has 32 divisors (see below), whose sum is σ = 140133888. Its totient is φ = 20655360.

The previous prime is 66006539. The next prime is 66006547. The reversal of 66006546 is 64560066.

It is a super-2 number, since 2×66006546² = 8713728229700232, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66006547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66111 + ... + 67101.

It is an arithmetic number, because the mean of its divisors is an integer number (4379184).

Almost surely, 2^66006546 is an apocalyptic number.

66006546 is an abundant number, since it is smaller than the sum of its proper divisors (74127342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66006546 is a wasteful number, since it uses less digits than its factorization.

66006546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 66006546 is about 8124.4412730969. The cubic root of 66006546 is about 404.1373622050.

The spelling of 66006546 in words is "sixty-six million, six thousand, five hundred forty-six".