66694630 has 8 divisors (see below), whose sum is σ = 120050352. Its totient is φ = 26677848.

The previous prime is 66694597. The next prime is 66694637. The reversal of 66694630 is 3649666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66694637) 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, 3334722 + ... + 3334741.

It is an arithmetic number, because the mean of its divisors is an integer number (15006294).

Almost surely, 2^66694630 is an apocalyptic number.

66694630 is a deficient number, since it is larger than the sum of its proper divisors (53355722).

66694630 is a wasteful number, since it uses less digits than its factorization.

66694630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669470.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 66694630 is about 8166.6780272030. The cubic root of 66694630 is about 405.5368179941.

The spelling of 66694630 in words is "sixty-six million, six hundred ninety-four thousand, six hundred thirty".