66407470465 has 16 divisors (see below), whose sum is σ = 91334073600. Its totient is φ = 45406065600.

The previous prime is 66407470439. The next prime is 66407470489. The reversal of 66407470465 is 56407470466.

66407470465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-66407470465 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2706061 + ... + 2730490.

It is an arithmetic number, because the mean of its divisors is an integer number (5708379600).

Almost surely, 2^66407470465 is an apocalyptic number.

It is an amenable number.

66407470465 is a deficient number, since it is larger than the sum of its proper divisors (24926603135).

66407470465 is a wasteful number, since it uses less digits than its factorization.

66407470465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436912.

The product of its (nonzero) digits is 3386880, while the sum is 49.

Subtracting from 66407470465 its reverse (56407470466), we obtain a palindrome (9999999999).

The spelling of 66407470465 in words is "sixty-six billion, four hundred seven million, four hundred seventy thousand, four hundred sixty-five".