166193671490 has 32 divisors (see below), whose sum is σ = 372964500864. Its totient is φ = 51800624640.

The previous prime is 166193671477. The next prime is 166193671537. The reversal of 166193671490 is 94176391661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107917199 + ... + 107918738.

It is an arithmetic number, because the mean of its divisors is an integer number (11655140652).

Almost surely, 2^166193671490 is an apocalyptic number.

166193671490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166193671490 is an abundant number, since it is smaller than the sum of its proper divisors (206770829374).

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

166193671490 is a wasteful number, since it uses less digits than its factorization.

166193671490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215835962.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 166193671490 in words is "one hundred sixty-six billion, one hundred ninety-three million, six hundred seventy-one thousand, four hundred ninety".