66249463 has 8 divisors (see below), whose sum is σ = 75782432. Its totient is φ = 56733696.

The previous prime is 66249431. The next prime is 66249487. The reversal of 66249463 is 36494266.

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

It is a cyclic number.

It is not a de Polignac number, because 66249463 - 2⁵ = 66249431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66249863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5431 + ... + 12727.

It is an arithmetic number, because the mean of its divisors is an integer number (9472804).

Almost surely, 2^66249463 is an apocalyptic number.

66249463 is a deficient number, since it is larger than the sum of its proper divisors (9532969).

66249463 is a wasteful number, since it uses less digits than its factorization.

66249463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8601.

The product of its digits is 186624, while the sum is 40.

The square root of 66249463 is about 8139.3773103352. The cubic root of 66249463 is about 404.6325234511.

The spelling of 66249463 in words is "sixty-six million, two hundred forty-nine thousand, four hundred sixty-three".