66134889 has 6 divisors (see below), whose sum is σ = 95528186. Its totient is φ = 44089920.

The previous prime is 66134863. The next prime is 66134897. The reversal of 66134889 is 98843166.

It can be written as a sum of positive squares in only one way, i.e., 56475225 + 9659664 = 7515^2 + 3108^2 .

It is not a de Polignac number, because 66134889 - 2⁵ = 66134857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66134899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3674152 + ... + 3674169.

Almost surely, 2^66134889 is an apocalyptic number.

It is an amenable number.

66134889 is a deficient number, since it is larger than the sum of its proper divisors (29393297).

66134889 is a wasteful number, since it uses less digits than its factorization.

66134889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7348327 (or 7348324 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 66134889 is about 8132.3360112578. The cubic root of 66134889 is about 404.3991272541.

The spelling of 66134889 in words is "sixty-six million, one hundred thirty-four thousand, eight hundred eighty-nine".