66694730 has 8 divisors (see below), whose sum is σ = 120050532. Its totient is φ = 26677888.

The previous prime is 66694729. The next prime is 66694753. The reversal of 66694730 is 3749666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63186601 + 3508129 = 7949^2 + 1873^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334727 + ... + 3334746.

Almost surely, 2^66694730 is an apocalyptic number.

66694730 is a deficient number, since it is larger than the sum of its proper divisors (53355802).

66694730 is a wasteful number, since it uses less digits than its factorization.

66694730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669480.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 66694730 is about 8166.6841496412. The cubic root of 66694730 is about 405.5370206774.

The spelling of 66694730 in words is "sixty-six million, six hundred ninety-four thousand, seven hundred thirty".