66260551 has 8 divisors (see below), whose sum is σ = 77573664. Its totient is φ = 55409280.

The previous prime is 66260531. The next prime is 66260627. The reversal of 66260551 is 15506266.

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 66260551 - 2¹³ = 66252359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66260501) 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, 115150 + ... + 115723.

It is an arithmetic number, because the mean of its divisors is an integer number (9696708).

Almost surely, 2^66260551 is an apocalyptic number.

66260551 is a deficient number, since it is larger than the sum of its proper divisors (11313113).

66260551 is a wasteful number, since it uses less digits than its factorization.

66260551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230921.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 66260551 is about 8140.0584150238. The cubic root of 66260551 is about 404.6550962889.

The spelling of 66260551 in words is "sixty-six million, two hundred sixty thousand, five hundred fifty-one".