166666751760 has 40 divisors (see below), whose sum is σ = 516666931200. Its totient is φ = 44444467072.

The previous prime is 166666751749. The next prime is 166666751777. The reversal of 166666751760 is 67157666661.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×166666751760² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166666751760.

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, 347222160 + ... + 347222639.

It is an arithmetic number, because the mean of its divisors is an integer number (12916673280).

Almost surely, 2^166666751760 is an apocalyptic number.

166666751760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166666751760 is an abundant number, since it is smaller than the sum of its proper divisors (350000179440).

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

166666751760 is a wasteful number, since it uses less digits than its factorization.

166666751760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694444815 (or 694444809 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 57.

The spelling of 166666751760 in words is "one hundred sixty-six billion, six hundred sixty-six million, seven hundred fifty-one thousand, seven hundred sixty".