66340634 has 4 divisors (see below), whose sum is σ = 99510954. Its totient is φ = 33170316.

The previous prime is 66340633. The next prime is 66340639. The reversal of 66340634 is 43604366.

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

It can be written as a sum of positive squares in only one way, i.e., 66178225 + 162409 = 8135^2 + 403^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66340634.

It is not an unprimeable number, because it can be changed into a prime (66340633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16585157 + ... + 16585160.

Almost surely, 2^66340634 is an apocalyptic number.

66340634 is a deficient number, since it is larger than the sum of its proper divisors (33170320).

66340634 is a wasteful number, since it uses less digits than its factorization.

66340634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33170319.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 66340634 is about 8144.9759975091. The cubic root of 66340634 is about 404.8180537197.

The spelling of 66340634 in words is "sixty-six million, three hundred forty thousand, six hundred thirty-four".