166423011216 has 240 divisors, whose sum is σ = 546151258368. Its totient is φ = 43181779200.

The previous prime is 166423011173. The next prime is 166423011233. The reversal of 166423011216 is 612110324661.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30086371 + ... + 30091901.

Almost surely, 2^166423011216 is an apocalyptic number.

166423011216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166423011216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273075629184).

166423011216 is an abundant number, since it is smaller than the sum of its proper divisors (379728247152).

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

166423011216 is a wasteful number, since it uses less digits than its factorization.

166423011216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730 (or 6717 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

Adding to 166423011216 its reverse (612110324661), we get a palindrome (778533335877).

The spelling of 166423011216 in words is "one hundred sixty-six billion, four hundred twenty-three million, eleven thousand, two hundred sixteen".