66649464 has 48 divisors (see below), whose sum is σ = 206297520. Its totient is φ = 19042560.

The previous prime is 66649459. The next prime is 66649481. The reversal of 66649464 is 46494666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65617 + ... + 66624.

It is an arithmetic number, because the mean of its divisors is an integer number (4297865).

Almost surely, 2^66649464 is an apocalyptic number.

It is an amenable number.

66649464 is an abundant number, since it is smaller than the sum of its proper divisors (139648056).

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

66649464 is a wasteful number, since it uses less digits than its factorization.

66649464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132260 (or 132253 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 66649464 is about 8163.9122974221. The cubic root of 66649464 is about 405.4452533401.

The spelling of 66649464 in words is "sixty-six million, six hundred forty-nine thousand, four hundred sixty-four".