66146091 has 16 divisors (see below), whose sum is σ = 100396800. Its totient is φ = 38345120.

The previous prime is 66146063. The next prime is 66146107. The reversal of 66146091 is 19064166.

It is not a de Polignac number, because 66146091 - 2⁶ = 66146027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (66146191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42816 + ... + 44333.

It is an arithmetic number, because the mean of its divisors is an integer number (6274800).

Almost surely, 2^66146091 is an apocalyptic number.

66146091 is a deficient number, since it is larger than the sum of its proper divisors (34250709).

66146091 is a wasteful number, since it uses less digits than its factorization.

66146091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87186.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 66146091 is about 8133.0247140901. The cubic root of 66146091 is about 404.4219584876.

The spelling of 66146091 in words is "sixty-six million, one hundred forty-six thousand, ninety-one".