66491119 has 4 divisors (see below), whose sum is σ = 66529840. Its totient is φ = 66452400.

The previous prime is 66491107. The next prime is 66491147. The reversal of 66491119 is 91119466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66491119 is a prime.

It is a super-2 number, since 2×66491119² = 8842137811744322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66491419) 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, 16659 + ... + 20260.

It is an arithmetic number, because the mean of its divisors is an integer number (16632460).

Almost surely, 2^66491119 is an apocalyptic number.

66491119 is a deficient number, since it is larger than the sum of its proper divisors (38721).

66491119 is a wasteful number, since it uses less digits than its factorization.

66491119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38720.

The product of its digits is 11664, while the sum is 37.

The square root of 66491119 is about 8154.2086679211. The cubic root of 66491119 is about 405.1239147324.

The spelling of 66491119 in words is "sixty-six million, four hundred ninety-one thousand, one hundred nineteen".