66733399465 has 4 divisors (see below), whose sum is σ = 80080079364. Its totient is φ = 53386719568.

The previous prime is 66733399451. The next prime is 66733399487. The reversal of 66733399465 is 56499333766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47047345216 + 19686054249 = 216904^2 + 140307^2 .

It is a cyclic number.

It is not a de Polignac number, because 66733399465 - 2⁵ = 66733399433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6673339942 + ... + 6673339951.

It is an arithmetic number, because the mean of its divisors is an integer number (20020019841).

Almost surely, 2^66733399465 is an apocalyptic number.

It is an amenable number.

66733399465 is a deficient number, since it is larger than the sum of its proper divisors (13346679899).

66733399465 is a wasteful number, since it uses less digits than its factorization.

66733399465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346679898.

The product of its digits is 66134880, while the sum is 61.

The spelling of 66733399465 in words is "sixty-six billion, seven hundred thirty-three million, three hundred ninety-nine thousand, four hundred sixty-five".