66172092 has 96 divisors (see below), whose sum is σ = 188697600. Its totient is φ = 17617920.

The previous prime is 66172087. The next prime is 66172097. The reversal of 66172092 is 29027166.

It is an interprime number because it is at equal distance from previous prime (66172087) and next prime (66172097).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66172097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212617 + ... + 212927.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^66172092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66172092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94348800).

66172092 is an abundant number, since it is smaller than the sum of its proper divisors (122525508).

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

66172092 is a wasteful number, since it uses less digits than its factorization.

66172092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 489 counting only the distinct ones).

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

The square root of 66172092 is about 8134.6230398218. The cubic root of 66172092 is about 404.4749422073.

The spelling of 66172092 in words is "sixty-six million, one hundred seventy-two thousand, ninety-two".