85066139 has 12 divisors (see below), whose sum is σ = 89017920. Its totient is φ = 81204000.

The previous prime is 85066129. The next prime is 85066151. The reversal of 85066139 is 93166058.

It is not a de Polignac number, because 85066139 - 2⁴ = 85066123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85066109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316097 + ... + 316365.

It is an arithmetic number, because the mean of its divisors is an integer number (7418160).

Almost surely, 2^85066139 is an apocalyptic number.

85066139 is a deficient number, since it is larger than the sum of its proper divisors (3951781).

85066139 is a wasteful number, since it uses less digits than its factorization.

85066139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 85066139 is about 9223.1306507064. The cubic root of 85066139 is about 439.7969776179.

The spelling of 85066139 in words is "eighty-five million, sixty-six thousand, one hundred thirty-nine".