166666703770 has 16 divisors (see below), whose sum is σ = 342857219328. Its totient is φ = 57142869840.

The previous prime is 166666703761. The next prime is 166666703779. The reversal of 166666703770 is 77307666661.

It is an interprime number because it is at equal distance from previous prime (166666703761) and next prime (166666703779).

It is not an unprimeable number, because it can be changed into a prime (166666703779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190476386 + ... + 1190476525.

It is an arithmetic number, because the mean of its divisors is an integer number (21428576208).

Almost surely, 2^166666703770 is an apocalyptic number.

166666703770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166666703770 is an abundant number, since it is smaller than the sum of its proper divisors (176190515558).

166666703770 is a wasteful number, since it uses less digits than its factorization.

166666703770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380952925.

The product of its (nonzero) digits is 8001504, while the sum is 55.

The spelling of 166666703770 in words is "one hundred sixty-six billion, six hundred sixty-six million, seven hundred three thousand, seven hundred seventy".