7345421666 has 32 divisors (see below), whose sum is σ = 12710186496. Its totient is φ = 3152304000.

The previous prime is 7345421663. The next prime is 7345421669. The reversal of 7345421666 is 6661245437.

It is an interprime number because it is at equal distance from previous prime (7345421663) and next prime (7345421669).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7345421663) 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, 103385 + ... + 159308.

It is an arithmetic number, because the mean of its divisors is an integer number (397193328).

Almost surely, 2^7345421666 is an apocalyptic number.

7345421666 is a deficient number, since it is larger than the sum of its proper divisors (5364764830).

7345421666 is a wasteful number, since it uses less digits than its factorization.

7345421666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262778.

The product of its digits is 725760, while the sum is 44.

The square root of 7345421666 is about 85705.4354519012. The cubic root of 7345421666 is about 1943.8924987619.

The spelling of 7345421666 in words is "seven billion, three hundred forty-five million, four hundred twenty-one thousand, six hundred sixty-six".