66051385 has 8 divisors (see below), whose sum is σ = 80605440. Its totient is φ = 51945264.

The previous prime is 66051367. The next prime is 66051389. The reversal of 66051385 is 58315066.

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 66051385 - 2⁷ = 66051257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66051385.

It is not an unprimeable number, because it can be changed into a prime (66051389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111657 + ... + 112246.

It is an arithmetic number, because the mean of its divisors is an integer number (10075680).

Almost surely, 2^66051385 is an apocalyptic number.

It is an amenable number.

66051385 is a deficient number, since it is larger than the sum of its proper divisors (14554055).

66051385 is a wasteful number, since it uses less digits than its factorization.

66051385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223967.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 66051385 is about 8127.2003174525. The cubic root of 66051385 is about 404.2288531986.

The spelling of 66051385 in words is "sixty-six million, fifty-one thousand, three hundred eighty-five".