66793730 has 8 divisors (see below), whose sum is σ = 120228732. Its totient is φ = 26717488.

The previous prime is 66793729. The next prime is 66793733. The reversal of 66793730 is 3739766.

66793730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60357361 + 6436369 = 7769^2 + 2537^2 .

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

It is a super-2 number, since 2×66793730² = 8922804734625800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66793733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3339677 + ... + 3339696.

Almost surely, 2^66793730 is an apocalyptic number.

66793730 is a deficient number, since it is larger than the sum of its proper divisors (53435002).

66793730 is a wasteful number, since it uses less digits than its factorization.

66793730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6679380.

The product of its (nonzero) digits is 142884, while the sum is 41.

The square root of 66793730 is about 8172.7431135452. The cubic root of 66793730 is about 405.7375778350.

The spelling of 66793730 in words is "sixty-six million, seven hundred ninety-three thousand, seven hundred thirty".