66719630 has 8 divisors (see below), whose sum is σ = 120095352. Its totient is φ = 26687848.

The previous prime is 66719581. The next prime is 66719647. The reversal of 66719630 is 3691766.

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

It is a congruent 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, 3335972 + ... + 3335991.

It is an arithmetic number, because the mean of its divisors is an integer number (15011919).

Almost surely, 2^66719630 is an apocalyptic number.

66719630 is a deficient number, since it is larger than the sum of its proper divisors (53375722).

66719630 is a wasteful number, since it uses less digits than its factorization.

66719630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671970.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 66719630 is about 8168.2084939110. The cubic root of 66719630 is about 405.5874825125.

The spelling of 66719630 in words is "sixty-six million, seven hundred nineteen thousand, six hundred thirty".