166471116640 has 24 divisors (see below), whose sum is σ = 393288013440. Its totient is φ = 66588446592.

The previous prime is 166471116613. The next prime is 166471116641. The reversal of 166471116640 is 46611174661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166471116641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520222080 + ... + 520222399.

It is an arithmetic number, because the mean of its divisors is an integer number (16387000560).

Almost surely, 2^166471116640 is an apocalyptic number.

166471116640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166471116640 is an abundant number, since it is smaller than the sum of its proper divisors (226816896800).

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

166471116640 is a wasteful number, since it uses less digits than its factorization.

166471116640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040444494 (or 1040444486 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 166471116640 in words is "one hundred sixty-six billion, four hundred seventy-one million, one hundred sixteen thousand, six hundred forty".