187197066 has 48 divisors (see below), whose sum is σ = 466537344. Its totient is φ = 53138592.

The previous prime is 187197061. The next prime is 187197071. The reversal of 187197066 is 660791781.

It is an interprime number because it is at equal distance from previous prime (187197061) and next prime (187197071).

It is not an unprimeable number, because it can be changed into a prime (187197061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15051 + ... + 24513.

It is an arithmetic number, because the mean of its divisors is an integer number (9719528).

Almost surely, 2^187197066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187197066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233268672).

187197066 is an abundant number, since it is smaller than the sum of its proper divisors (279340278).

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

187197066 is a wasteful number, since it uses less digits than its factorization.

187197066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9635 (or 9632 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 187197066 is about 13681.9978804267. The cubic root of 187197066 is about 572.0487125776.

The spelling of 187197066 in words is "one hundred eighty-seven million, one hundred ninety-seven thousand, sixty-six".