81670060 has 24 divisors (see below), whose sum is σ = 172272240. Its totient is φ = 32522304.

The previous prime is 81670051. The next prime is 81670081. The reversal of 81670060 is 6007618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4455 + ... + 13534.

It is an arithmetic number, because the mean of its divisors is an integer number (7178010).

Almost surely, 2^81670060 is an apocalyptic number.

It is an amenable number.

81670060 is an abundant number, since it is smaller than the sum of its proper divisors (90602180).

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

81670060 is a wasteful number, since it uses less digits than its factorization.

81670060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18225 (or 18223 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 81670060 is about 9037.1488866788. The cubic root of 81670060 is about 433.8646749756.

Adding to 81670060 its reverse (6007618), we get a palindrome (87677678).

It can be divided in two parts, 816 and 70060, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 81670060 in words is "eighty-one million, six hundred seventy thousand, sixty".