73698120666 has 12 divisors (see below), whose sum is σ = 159679261482. Its totient is φ = 24566040216.

The previous prime is 73698120659. The next prime is 73698120667. The reversal of 73698120666 is 66602189637.

It can be written as a sum of positive squares in only one way, i.e., 68788175625 + 4909945041 = 262275^2 + 70071^2 .

It is not an unprimeable number, because it can be changed into a prime (73698120667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2047170001 + ... + 2047170036.

Almost surely, 2^73698120666 is an apocalyptic number.

73698120666 is an abundant number, since it is smaller than the sum of its proper divisors (85981140816).

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

73698120666 is a wasteful number, since it uses less digits than its factorization.

73698120666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094340045 (or 4094340042 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 73698120666 in words is "seventy-three billion, six hundred ninety-eight million, one hundred twenty thousand, six hundred sixty-six".