66949149 has 4 divisors (see below), whose sum is σ = 89265536. Its totient is φ = 44632764.

The previous prime is 66949121. The next prime is 66949171. The reversal of 66949149 is 94194966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66949149 - 2⁵ = 66949117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66949098 and 66949107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66949189) 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, 11158189 + ... + 11158194.

It is an arithmetic number, because the mean of its divisors is an integer number (22316384).

Almost surely, 2^66949149 is an apocalyptic number.

It is an amenable number.

66949149 is a deficient number, since it is larger than the sum of its proper divisors (22316387).

66949149 is a wasteful number, since it uses less digits than its factorization.

66949149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22316386.

The product of its digits is 419904, while the sum is 48.

The square root of 66949149 is about 8182.2459630593. The cubic root of 66949149 is about 406.0520309125.

The spelling of 66949149 in words is "sixty-six million, nine hundred forty-nine thousand, one hundred forty-nine".