66963785 has 8 divisors (see below), whose sum is σ = 91836096. Its totient is φ = 45918000.

The previous prime is 66963781. The next prime is 66963791. The reversal of 66963785 is 58736966.

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

It is not a de Polignac number, because 66963785 - 2² = 66963781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66963781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956591 + ... + 956660.

It is an arithmetic number, because the mean of its divisors is an integer number (11479512).

Almost surely, 2^66963785 is an apocalyptic number.

It is an amenable number.

66963785 is a deficient number, since it is larger than the sum of its proper divisors (24872311).

66963785 is a wasteful number, since it uses less digits than its factorization.

66963785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913263.

The product of its digits is 1632960, while the sum is 50.

The square root of 66963785 is about 8183.1402896443. The cubic root of 66963785 is about 406.0816182664.

The spelling of 66963785 in words is "sixty-six million, nine hundred sixty-three thousand, seven hundred eighty-five".