83723707666 has 4 divisors (see below), whose sum is σ = 125585561502. Its totient is φ = 41861853832.

The previous prime is 83723707631. The next prime is 83723707729. The reversal of 83723707666 is 66670732738.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72322807041 + 11400900625 = 268929^2 + 106775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20930926915 + ... + 20930926918.

Almost surely, 2^83723707666 is an apocalyptic number.

83723707666 is a deficient number, since it is larger than the sum of its proper divisors (41861853836).

83723707666 is a wasteful number, since it uses less digits than its factorization.

83723707666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41861853835.

The product of its (nonzero) digits is 10668672, while the sum is 55.

The spelling of 83723707666 in words is "eighty-three billion, seven hundred twenty-three million, seven hundred seven thousand, six hundred sixty-six".