66570660746 has 16 divisors (see below), whose sum is σ = 100242117000. Its totient is φ = 33156695040.

The previous prime is 66570660733. The next prime is 66570660787. The reversal of 66570660746 is 64706607566.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33103983025 + 33466677721 = 181945^2 + 182939^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2016380 + ... + 2049128.

Almost surely, 2^66570660746 is an apocalyptic number.

66570660746 is a deficient number, since it is larger than the sum of its proper divisors (33671456254).

66570660746 is a wasteful number, since it uses less digits than its factorization.

66570660746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36649.

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 66570660746 in words is "sixty-six billion, five hundred seventy million, six hundred sixty thousand, seven hundred forty-six".