3640800066 has 32 divisors (see below), whose sum is σ = 7333659648. Its totient is φ = 1204940880.

The previous prime is 3640800017. The next prime is 3640800089. The reversal of 3640800066 is 6600080463.

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, 1223961 + ... + 1226931.

It is an arithmetic number, because the mean of its divisors is an integer number (229176864).

Almost surely, 2^3640800066 is an apocalyptic number.

3640800066 is an abundant number, since it is smaller than the sum of its proper divisors (3692859582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3640800066 is a wasteful number, since it uses less digits than its factorization.

3640800066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 3640800066 is about 60339.0426341022. The cubic root of 3640800066 is about 1538.3870313277.

The spelling of 3640800066 in words is "three billion, six hundred forty million, eight hundred thousand, sixty-six".