66213006 has 16 divisors (see below), whose sum is σ = 134925264. Its totient is φ = 21654464.

The previous prime is 66212957. The next prime is 66213029. The reversal of 66213006 is 60031266.

66213006 = 450² + 451² + ... + 661².

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103791 + ... + 104426.

It is an arithmetic number, because the mean of its divisors is an integer number (8432829).

Almost surely, 2^66213006 is an apocalyptic number.

66213006 is an abundant number, since it is smaller than the sum of its proper divisors (68712258).

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

66213006 is a wasteful number, since it uses less digits than its factorization.

66213006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208275.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 66213006 is about 8137.1374573618. The cubic root of 66213006 is about 404.5582869013.

The spelling of 66213006 in words is "sixty-six million, two hundred thirteen thousand, six".