7645664066 has 8 divisors (see below), whose sum is σ = 11481087744. Its totient is φ = 3818634820.

The previous prime is 7645664057. The next prime is 7645664069. The reversal of 7645664066 is 6604665467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7645664069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096330 + ... + 2099973.

It is an arithmetic number, because the mean of its divisors is an integer number (1435135968).

Almost surely, 2^7645664066 is an apocalyptic number.

7645664066 is a deficient number, since it is larger than the sum of its proper divisors (3835423678).

7645664066 is a wasteful number, since it uses less digits than its factorization.

7645664066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197216.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The square root of 7645664066 is about 87439.4880245762. The cubic root of 7645664066 is about 1970.0249995539.

The spelling of 7645664066 in words is "seven billion, six hundred forty-five million, six hundred sixty-four thousand, sixty-six".