66963774 has 8 divisors (see below), whose sum is σ = 133927560. Its totient is φ = 22321256.

The previous prime is 66963773. The next prime is 66963779. The reversal of 66963774 is 47736966.

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

66963774 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66963773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5580309 + ... + 5580320.

It is an arithmetic number, because the mean of its divisors is an integer number (16740945).

Almost surely, 2^66963774 is an apocalyptic number.

66963774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66963774 is a wasteful number, since it uses less digits than its factorization.

66963774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11160634.

The product of its digits is 1143072, while the sum is 48.

The square root of 66963774 is about 8183.1396175307. The cubic root of 66963774 is about 406.0815960310.

The spelling of 66963774 in words is "sixty-six million, nine hundred sixty-three thousand, seven hundred seventy-four".