66779382 has 32 divisors (see below), whose sum is σ = 135717120. Its totient is φ = 21903200.

The previous prime is 66779381. The next prime is 66779389. The reversal of 66779382 is 28397766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66779381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159169 + ... + 159587.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^66779382 is an apocalyptic number.

66779382 is an abundant number, since it is smaller than the sum of its proper divisors (68937738).

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

66779382 is a wasteful number, since it uses less digits than its factorization.

66779382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its digits is 762048, while the sum is 48.

The square root of 66779382 is about 8171.8652705487. The cubic root of 66779382 is about 405.7085235128.

It can be divided in two parts, 66779 and 382, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 66779382 in words is "sixty-six million, seven hundred seventy-nine thousand, three hundred eighty-two".