66191334 has 16 divisors (see below), whose sum is σ = 144417600. Its totient is φ = 20057960.

The previous prime is 66191327. The next prime is 66191351. The reversal of 66191334 is 43319166.

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

It is a junction number, because it is equal to n+sod(n) for n = 66191295 and 66191304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501384 + ... + 501515.

It is an arithmetic number, because the mean of its divisors is an integer number (9026100).

Almost surely, 2^66191334 is an apocalyptic number.

66191334 is an abundant number, since it is smaller than the sum of its proper divisors (78226266).

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

66191334 is a wasteful number, since it uses less digits than its factorization.

66191334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002915.

The product of its digits is 11664, while the sum is 33.

The square root of 66191334 is about 8135.8056761454. The cubic root of 66191334 is about 404.5141437918.

The spelling of 66191334 in words is "sixty-six million, one hundred ninety-one thousand, three hundred thirty-four".