81670012214 has 8 divisors (see below), whose sum is σ = 140005735248. Its totient is φ = 35001433800.

The previous prime is 81670012201. The next prime is 81670012219. The reversal of 81670012214 is 41221007618.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81670012219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2916786137 + ... + 2916786164.

It is an arithmetic number, because the mean of its divisors is an integer number (17500716906).

Almost surely, 2^81670012214 is an apocalyptic number.

81670012214 is a deficient number, since it is larger than the sum of its proper divisors (58335723034).

81670012214 is a wasteful number, since it uses less digits than its factorization.

81670012214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833572310.

The product of its (nonzero) digits is 5376, while the sum is 32.

The spelling of 81670012214 in words is "eighty-one billion, six hundred seventy million, twelve thousand, two hundred fourteen".