66632665 has 8 divisors (see below), whose sum is σ = 87228288. Its totient is φ = 48460080.

The previous prime is 66632663. The next prime is 66632669. The reversal of 66632665 is 56623666.

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

It is not a de Polignac number, because 66632665 - 2¹ = 66632663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66632663) 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, 605697 + ... + 605806.

It is an arithmetic number, because the mean of its divisors is an integer number (10903536).

Almost surely, 2^66632665 is an apocalyptic number.

It is an amenable number.

66632665 is a deficient number, since it is larger than the sum of its proper divisors (20595623).

66632665 is a wasteful number, since it uses less digits than its factorization.

66632665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211519.

The product of its digits is 233280, while the sum is 40.

The square root of 66632665 is about 8162.8833753766. The cubic root of 66632665 is about 405.4111863138.

The spelling of 66632665 in words is "sixty-six million, six hundred thirty-two thousand, six hundred sixty-five".