66498165 has 48 divisors (see below), whose sum is σ = 120556800. Its totient is φ = 35163072.

The previous prime is 66498163. The next prime is 66498191. The reversal of 66498165 is 56189466.

It is not a de Polignac number, because 66498165 - 2¹ = 66498163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66498165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66498161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 278116 + ... + 278354.

It is an arithmetic number, because the mean of its divisors is an integer number (2511600).

Almost surely, 2^66498165 is an apocalyptic number.

It is an amenable number.

66498165 is a deficient number, since it is larger than the sum of its proper divisors (54058635).

66498165 is a wasteful number, since it uses less digits than its factorization.

66498165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 476 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 66498165 is about 8154.6407033051. The cubic root of 66498165 is about 405.1382244243.

The spelling of 66498165 in words is "sixty-six million, four hundred ninety-eight thousand, one hundred sixty-five".