66072566 has 32 divisors (see below), whose sum is σ = 118056960. Its totient is φ = 27144000.

The previous prime is 66072547. The next prime is 66072581. The reversal of 66072566 is 66527066.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32891 + ... + 34841.

It is an arithmetic number, because the mean of its divisors is an integer number (3689280).

Almost surely, 2^66072566 is an apocalyptic number.

66072566 is a deficient number, since it is larger than the sum of its proper divisors (51984394).

66072566 is a wasteful number, since it uses less digits than its factorization.

66072566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 66072566 is about 8128.5033062674. The cubic root of 66072566 is about 404.2720572197.

The spelling of 66072566 in words is "sixty-six million, seventy-two thousand, five hundred sixty-six".