66981192 has 16 divisors (see below), whose sum is σ = 167453040. Its totient is φ = 22327056.

The previous prime is 66981191. The next prime is 66981193. The reversal of 66981192 is 29118966.

It is an interprime number because it is at equal distance from previous prime (66981191) and next prime (66981193).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66981191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395418 + ... + 1395465.

It is an arithmetic number, because the mean of its divisors is an integer number (10465815).

Almost surely, 2^66981192 is an apocalyptic number.

It is an amenable number.

66981192 is an abundant number, since it is smaller than the sum of its proper divisors (100471848).

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

66981192 is a wasteful number, since it uses less digits than its factorization.

66981192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790892 (or 2790888 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 66981192 is about 8184.2038097789. The cubic root of 66981192 is about 406.1168017134.

It can be divided in two parts, 669811 and 92, that added together give a triangular number (669903 = T₁₁₅₇).

The spelling of 66981192 in words is "sixty-six million, nine hundred eighty-one thousand, one hundred ninety-two".