66251063 has 8 divisors (see below), whose sum is σ = 70266336. Its totient is φ = 62330400.

The previous prime is 66251021. The next prime is 66251069. The reversal of 66251063 is 36015266.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66251063 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 (66251069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22208 + ... + 25013.

It is an arithmetic number, because the mean of its divisors is an integer number (8783292).

Almost surely, 2^66251063 is an apocalyptic number.

66251063 is a deficient number, since it is larger than the sum of its proper divisors (4015273).

66251063 is a wasteful number, since it uses less digits than its factorization.

66251063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47305.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66251063 is about 8139.4755973588. The cubic root of 66251063 is about 404.6357808704.

The spelling of 66251063 in words is "sixty-six million, two hundred fifty-one thousand, sixty-three".