66606463 has 16 divisors (see below), whose sum is σ = 83303424. Its totient is φ = 51737760.

The previous prime is 66606451. The next prime is 66606469. The reversal of 66606463 is 36460666.

It is a cyclic number.

It is not a de Polignac number, because 66606463 - 2⁵ = 66606431 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 (66606469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27081 + ... + 29437.

It is an arithmetic number, because the mean of its divisors is an integer number (5206464).

Almost surely, 2^66606463 is an apocalyptic number.

66606463 is a deficient number, since it is larger than the sum of its proper divisors (16696961).

66606463 is a wasteful number, since it uses less digits than its factorization.

66606463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 66606463 is about 8161.2782699771. The cubic root of 66606463 is about 405.3580393246.

The spelling of 66606463 in words is "sixty-six million, six hundred six thousand, four hundred sixty-three".