66234655 has 4 divisors (see below), whose sum is σ = 79481592. Its totient is φ = 52987720.

The previous prime is 66234653. The next prime is 66234661. The reversal of 66234655 is 55643266.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66234655 - 2¹ = 66234653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66234653) 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, 6623461 + ... + 6623470.

It is an arithmetic number, because the mean of its divisors is an integer number (19870398).

Almost surely, 2^66234655 is an apocalyptic number.

66234655 is a deficient number, since it is larger than the sum of its proper divisors (13246937).

66234655 is a wasteful number, since it uses less digits than its factorization.

66234655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13246936.

The product of its digits is 129600, while the sum is 37.

The square root of 66234655 is about 8138.4676076028. The cubic root of 66234655 is about 404.6023735469.

The spelling of 66234655 in words is "sixty-six million, two hundred thirty-four thousand, six hundred fifty-five".