66213734 has 8 divisors (see below), whose sum is σ = 103638960. Its totient is φ = 31667416.

The previous prime is 66213733. The next prime is 66213739. The reversal of 66213734 is 43731266.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66213734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66213733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719669 + ... + 719760.

It is an arithmetic number, because the mean of its divisors is an integer number (12954870).

Almost surely, 2^66213734 is an apocalyptic number.

66213734 is a deficient number, since it is larger than the sum of its proper divisors (37425226).

66213734 is a wasteful number, since it uses less digits than its factorization.

66213734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439454.

The product of its digits is 18144, while the sum is 32.

The square root of 66213734 is about 8137.1821904146. The cubic root of 66213734 is about 404.5597695776.

The spelling of 66213734 in words is "sixty-six million, two hundred thirteen thousand, seven hundred thirty-four".