139666274 has 8 divisors (see below), whose sum is σ = 228544848. Its totient is φ = 63484660.

The previous prime is 139666229. The next prime is 139666277. The reversal of 139666274 is 472666931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (139666277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3174212 + ... + 3174255.

It is an arithmetic number, because the mean of its divisors is an integer number (28568106).

Almost surely, 2^139666274 is an apocalyptic number.

139666274 is a deficient number, since it is larger than the sum of its proper divisors (88878574).

139666274 is a wasteful number, since it uses less digits than its factorization.

139666274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348480.

The product of its digits is 326592, while the sum is 44.

The square root of 139666274 is about 11818.0486544945. The cubic root of 139666274 is about 518.8364937501.

The spelling of 139666274 in words is "one hundred thirty-nine million, six hundred sixty-six thousand, two hundred seventy-four".