66899377 has 4 divisors (see below), whose sum is σ = 68322816. Its totient is φ = 65475940.

The previous prime is 66899359. The next prime is 66899401. The reversal of 66899377 is 77399866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66899377 - 2²³ = 58510769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66899477) 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 3 ways as a sum of consecutive naturals, for example, 711649 + ... + 711742.

It is an arithmetic number, because the mean of its divisors is an integer number (17080704).

Almost surely, 2^66899377 is an apocalyptic number.

It is an amenable number.

66899377 is a deficient number, since it is larger than the sum of its proper divisors (1423439).

66899377 is a wasteful number, since it uses less digits than its factorization.

66899377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423438.

The product of its digits is 3429216, while the sum is 55.

The square root of 66899377 is about 8179.2039343692. The cubic root of 66899377 is about 405.9513822246.

It can be divided in two parts, 66899 and 377, that added together give a palindrome (67276).

The spelling of 66899377 in words is "sixty-six million, eight hundred ninety-nine thousand, three hundred seventy-seven".