166371612 has 72 divisors (see below), whose sum is σ = 430122000. Its totient is φ = 50012160.

The previous prime is 166371593. The next prime is 166371613. The reversal of 166371612 is 216173661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166371613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215964 + ... + 216732.

Almost surely, 2^166371612 is an apocalyptic number.

166371612 is a gapful number since it is divisible by the number (12) 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 166371612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215061000).

166371612 is an abundant number, since it is smaller than the sum of its proper divisors (263750388).

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

166371612 is a wasteful number, since it uses less digits than its factorization.

166371612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 934 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 166371612 is about 12898.5120072046. The cubic root of 166371612 is about 549.9962666413.

The spelling of 166371612 in words is "one hundred sixty-six million, three hundred seventy-one thousand, six hundred twelve".