66889632 has 48 divisors (see below), whose sum is σ = 176020992. Its totient is φ = 22241280.

The previous prime is 66889621. The next prime is 66889663. The reversal of 66889632 is 23698866.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60993 + ... + 62079.

It is an arithmetic number, because the mean of its divisors is an integer number (3667104).

Almost surely, 2^66889632 is an apocalyptic number.

It is an amenable number.

66889632 is an abundant number, since it is smaller than the sum of its proper divisors (109131360).

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

66889632 is a wasteful number, since it uses less digits than its factorization.

66889632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741 (or 1733 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 66889632 is about 8178.6081945524. The cubic root of 66889632 is about 405.9316700913.

The spelling of 66889632 in words is "sixty-six million, eight hundred eighty-nine thousand, six hundred thirty-two".