166715066670666 has 64 divisors (see below), whose sum is σ = 335394381269376. Its totient is φ = 55245494937600.

The previous prime is 166715066670661. The next prime is 166715066670671. The reversal of 166715066670666 is 666076660517661.

It is an interprime number because it is at equal distance from previous prime (166715066670661) and next prime (166715066670671).

It is a self number, because there is not a number n which added to its sum of digits gives 166715066670666.

It is not an unprimeable number, because it can be changed into a prime (166715066670661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1009204596 + ... + 1009369776.

It is an arithmetic number, because the mean of its divisors is an integer number (5240537207334).

Almost surely, 2^{166715066670666} is an apocalyptic number.

166715066670666 is an abundant number, since it is smaller than the sum of its proper divisors (168679314598710).

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

166715066670666 is a wasteful number, since it uses less digits than its factorization.

166715066670666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166967.

The product of its (nonzero) digits is 411505920, while the sum is 69.

The spelling of 166715066670666 in words is "one hundred sixty-six trillion, seven hundred fifteen billion, sixty-six million, six hundred seventy thousand, six hundred sixty-six".