149666839971 has 48 divisors (see below), whose sum is σ = 236897232768. Its totient is φ = 83289011200.

The previous prime is 149666839967. The next prime is 149666839979. The reversal of 149666839971 is 179938666941.

It is not a de Polignac number, because 149666839971 - 2² = 149666839967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149666839896 and 149666839905.

It is not an unprimeable number, because it can be changed into a prime (149666839979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199636 + ... + 582398.

It is an arithmetic number, because the mean of its divisors is an integer number (4935359016).

Almost surely, 2^149666839971 is an apocalyptic number.

149666839971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

149666839971 is a deficient number, since it is larger than the sum of its proper divisors (87230392797).

149666839971 is a wasteful number, since it uses less digits than its factorization.

149666839971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382852 (or 382835 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 69.

The spelling of 149666839971 in words is "one hundred forty-nine billion, six hundred sixty-six million, eight hundred thirty-nine thousand, nine hundred seventy-one".