66101839 has 8 divisors (see below), whose sum is σ = 69062112. Its totient is φ = 63148800.

The previous prime is 66101837. The next prime is 66101873. The reversal of 66101839 is 93810166.

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

It is not a de Polignac number, because 66101839 - 2¹ = 66101837 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 (66101837) 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, 26427 + ... + 28819.

It is an arithmetic number, because the mean of its divisors is an integer number (8632764).

Almost surely, 2^66101839 is an apocalyptic number.

66101839 is a deficient number, since it is larger than the sum of its proper divisors (2960273).

66101839 is a wasteful number, since it uses less digits than its factorization.

66101839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 66101839 is about 8130.3037458634. The cubic root of 66101839 is about 404.3317517313.

The spelling of 66101839 in words is "sixty-six million, one hundred one thousand, eight hundred thirty-nine".