66567732104 has 8 divisors (see below), whose sum is σ = 124814497710. Its totient is φ = 33283866048.

The previous prime is 66567732103. The next prime is 66567732109. The reversal of 66567732104 is 40123776566.

It can be written as a sum of positive squares in only one way, i.e., 56883204004 + 9684528100 = 238502^2 + 98410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66567732103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4160483249 + ... + 4160483264.

Almost surely, 2^66567732104 is an apocalyptic number.

It is an amenable number.

66567732104 is a deficient number, since it is larger than the sum of its proper divisors (58246765606).

66567732104 is a wasteful number, since it uses less digits than its factorization.

66567732104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320966519 (or 8320966515 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 66567732104 in words is "sixty-six billion, five hundred sixty-seven million, seven hundred thirty-two thousand, one hundred four".