166021726370 has 16 divisors (see below), whose sum is σ = 298845695808. Its totient is φ = 66407226480.

The previous prime is 166021726337. The next prime is 166021726373. The reversal of 166021726370 is 73627120661.

It is not an unprimeable number, because it can be changed into a prime (166021726373) 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, 373985 + ... + 686955.

It is an arithmetic number, because the mean of its divisors is an integer number (18677855988).

Almost surely, 2^166021726370 is an apocalyptic number.

166021726370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166021726370 is a deficient number, since it is larger than the sum of its proper divisors (132823969438).

166021726370 is a wasteful number, since it uses less digits than its factorization.

166021726370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366025.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 166021726370 in words is "one hundred sixty-six billion, twenty-one million, seven hundred twenty-six thousand, three hundred seventy".