66634430 has 16 divisors (see below), whose sum is σ = 122868144. Its totient is φ = 26003520.

The previous prime is 66634417. The next prime is 66634453. The reversal of 66634430 is 3443666.

It is a super-2 number, since 2×66634430² = 8880294522849800, which contains 22 as substring.

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, 80852 + ... + 81671.

It is an arithmetic number, because the mean of its divisors is an integer number (7679259).

Almost surely, 2^66634430 is an apocalyptic number.

66634430 is a deficient number, since it is larger than the sum of its proper divisors (56233714).

66634430 is a wasteful number, since it uses less digits than its factorization.

66634430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162571.

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

The square root of 66634430 is about 8162.9914859689. The cubic root of 66634430 is about 405.4147658616.

The spelling of 66634430 in words is "sixty-six million, six hundred thirty-four thousand, four hundred thirty".