66303779 has 8 divisors (see below), whose sum is σ = 69734400. Its totient is φ = 62918856.

The previous prime is 66303751. The next prime is 66303781. The reversal of 66303779 is 97730366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66303779 is a prime.

It is a super-2 number, since 2×66303779² = 8792382219361682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66300779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8429 + ... + 14270.

It is an arithmetic number, because the mean of its divisors is an integer number (8716800).

Almost surely, 2^66303779 is an apocalyptic number.

66303779 is a deficient number, since it is larger than the sum of its proper divisors (3430621).

66303779 is a wasteful number, since it uses less digits than its factorization.

66303779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22849.

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

The square root of 66303779 is about 8142.7132455957. The cubic root of 66303779 is about 404.7430753737.

The spelling of 66303779 in words is "sixty-six million, three hundred three thousand, seven hundred seventy-nine".