66647414 has 4 divisors (see below), whose sum is σ = 99971124. Its totient is φ = 33323706.

The previous prime is 66647407. The next prime is 66647417. The reversal of 66647414 is 41474666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66647417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16661852 + ... + 16661855.

It is an arithmetic number, because the mean of its divisors is an integer number (24992781).

Almost surely, 2^66647414 is an apocalyptic number.

66647414 is a deficient number, since it is larger than the sum of its proper divisors (33323710).

66647414 is a wasteful number, since it uses less digits than its factorization.

66647414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33323709.

The product of its digits is 96768, while the sum is 38.

The square root of 66647414 is about 8163.7867439075. The cubic root of 66647414 is about 405.4410964110.

The spelling of 66647414 in words is "sixty-six million, six hundred forty-seven thousand, four hundred fourteen".