66350661 has 8 divisors (see below), whose sum is σ = 95272800. Its totient is φ = 40831152.

The previous prime is 66350659. The next prime is 66350671. The reversal of 66350661 is 16605366.

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

It is not a de Polignac number, because 66350661 - 2¹ = 66350659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66350611) 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, 850611 + ... + 850688.

It is an arithmetic number, because the mean of its divisors is an integer number (11909100).

Almost surely, 2^66350661 is an apocalyptic number.

It is an amenable number.

66350661 is a deficient number, since it is larger than the sum of its proper divisors (28922139).

66350661 is a wasteful number, since it uses less digits than its factorization.

66350661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701315.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 66350661 is about 8145.5915070669. The cubic root of 66350661 is about 404.8384479884.

The spelling of 66350661 in words is "sixty-six million, three hundred fifty thousand, six hundred sixty-one".