66422551 has 8 divisors (see below), whose sum is σ = 74642400. Its totient is φ = 58647072.

The previous prime is 66422513. The next prime is 66422567. The reversal of 66422551 is 15522466.

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 66422551 - 2⁹ = 66422039 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 (66422581) 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, 110776 + ... + 111373.

It is an arithmetic number, because the mean of its divisors is an integer number (9330300).

Almost surely, 2^66422551 is an apocalyptic number.

66422551 is a deficient number, since it is larger than the sum of its proper divisors (8219849).

66422551 is a wasteful number, since it uses less digits than its factorization.

66422551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222185.

The product of its digits is 14400, while the sum is 31.

The square root of 66422551 is about 8150.0031288338. The cubic root of 66422551 is about 404.9846074524.

The spelling of 66422551 in words is "sixty-six million, four hundred twenty-two thousand, five hundred fifty-one".