66779962 has 8 divisors (see below), whose sum is σ = 101542356. Its totient is φ = 32932512.

The previous prime is 66779899. The next prime is 66779969. The reversal of 66779962 is 26997766.

It can be written as a sum of positive squares in 2 ways, for example, as 66569281 + 210681 = 8159^2 + 459^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66779969) 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 3 ways as a sum of consecutive naturals, for example, 228553 + ... + 228844.

Almost surely, 2^66779962 is an apocalyptic number.

66779962 is a deficient number, since it is larger than the sum of its proper divisors (34762394).

66779962 is a wasteful number, since it uses less digits than its factorization.

66779962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457472.

The product of its digits is 1714608, while the sum is 52.

The square root of 66779962 is about 8171.9007580856. The cubic root of 66779962 is about 405.7096980782.

The spelling of 66779962 in words is "sixty-six million, seven hundred seventy-nine thousand, nine hundred sixty-two".