66717465 has 16 divisors (see below), whose sum is σ = 106850688. Its totient is φ = 35548416.

The previous prime is 66717463. The next prime is 66717481. The reversal of 66717465 is 56471766.

It is not a de Polignac number, because 66717465 - 2¹ = 66717463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66717463) 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, 25404 + ... + 27906.

It is an arithmetic number, because the mean of its divisors is an integer number (6678168).

Almost surely, 2^66717465 is an apocalyptic number.

It is an amenable number.

66717465 is a deficient number, since it is larger than the sum of its proper divisors (40133223).

66717465 is a wasteful number, since it uses less digits than its factorization.

66717465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288.

The product of its digits is 211680, while the sum is 42.

The square root of 66717465 is about 8168.0759668358. The cubic root of 66717465 is about 405.5830954658.

The spelling of 66717465 in words is "sixty-six million, seven hundred seventeen thousand, four hundred sixty-five".