66456495 has 36 divisors (see below), whose sum is σ = 134002440. Its totient is φ = 30379104.

The previous prime is 66456491. The next prime is 66456521. The reversal of 66456495 is 59465466.

It is not a de Polignac number, because 66456495 - 2² = 66456491 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 66456495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66456491) 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 35 ways as a sum of consecutive naturals, for example, 12865 + ... + 17274.

It is an arithmetic number, because the mean of its divisors is an integer number (3722290).

Almost surely, 2^66456495 is an apocalyptic number.

66456495 is an abundant number, since it is smaller than the sum of its proper divisors (67545945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66456495 is a wasteful number, since it uses less digits than its factorization.

66456495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30164 (or 30154 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 66456495 is about 8152.0853160403. The cubic root of 66456495 is about 405.0535823025.

The spelling of 66456495 in words is "sixty-six million, four hundred fifty-six thousand, four hundred ninety-five".