66101563 has 8 divisors (see below), whose sum is σ = 75246336. Its totient is φ = 57479400.

The previous prime is 66101561. The next prime is 66101617. The reversal of 66101563 is 36510166.

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

It is not a de Polignac number, because 66101563 - 2¹ = 66101561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66101561) 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, 130383 + ... + 130888.

It is an arithmetic number, because the mean of its divisors is an integer number (9405792).

Almost surely, 2^66101563 is an apocalyptic number.

66101563 is a deficient number, since it is larger than the sum of its proper divisors (9144773).

66101563 is a wasteful number, since it uses less digits than its factorization.

66101563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261305.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 66101563 is about 8130.2867723101. The cubic root of 66101563 is about 404.3311889849.

The spelling of 66101563 in words is "sixty-six million, one hundred one thousand, five hundred sixty-three".