66139014 has 32 divisors (see below), whose sum is σ = 134265600. Its totient is φ = 21718112.

The previous prime is 66139001. The next prime is 66139063. The reversal of 66139014 is 41093166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149077 + ... + 149519.

It is an arithmetic number, because the mean of its divisors is an integer number (4195800).

Almost surely, 2^66139014 is an apocalyptic number.

66139014 is an abundant number, since it is smaller than the sum of its proper divisors (68126586).

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

66139014 is a wasteful number, since it uses less digits than its factorization.

66139014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 66139014 is about 8132.5896244677. The cubic root of 66139014 is about 404.4075348775.

The spelling of 66139014 in words is "sixty-six million, one hundred thirty-nine thousand, fourteen".