66889336 has 16 divisors (see below), whose sum is σ = 130870800. Its totient is φ = 31990464.

The previous prime is 66889307. The next prime is 66889337. The reversal of 66889336 is 63398866.

It is a self number, because there is not a number n which added to its sum of digits gives 66889336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66889337) 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, 181581 + ... + 181948.

It is an arithmetic number, because the mean of its divisors is an integer number (8179425).

Almost surely, 2^66889336 is an apocalyptic number.

It is an amenable number.

66889336 is a deficient number, since it is larger than the sum of its proper divisors (63981464).

66889336 is a wasteful number, since it uses less digits than its factorization.

66889336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363558 (or 363554 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The square root of 66889336 is about 8178.5900985439. The cubic root of 66889336 is about 405.9310713141.

The spelling of 66889336 in words is "sixty-six million, eight hundred eighty-nine thousand, three hundred thirty-six".