166669863970 has 16 divisors (see below), whose sum is σ = 304483454208. Its totient is φ = 65672901360.

The previous prime is 166669863947. The next prime is 166669864019. The reversal of 166669863970 is 79368966661.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a junction number, because it is equal to n+sod(n) for n = 166669863896 and 166669863905.

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, 124379826 + ... + 124381165.

It is an arithmetic number, because the mean of its divisors is an integer number (19030215888).

Almost surely, 2^166669863970 is an apocalyptic number.

166669863970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166669863970 is a deficient number, since it is larger than the sum of its proper divisors (137813590238).

166669863970 is a wasteful number, since it uses less digits than its factorization.

166669863970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248761065.

The product of its (nonzero) digits is 105815808, while the sum is 67.

The spelling of 166669863970 in words is "one hundred sixty-six billion, six hundred sixty-nine million, eight hundred sixty-three thousand, nine hundred seventy".