81006614 has 16 divisors (see below), whose sum is σ = 137744880. Its totient is φ = 35419680.

The previous prime is 81006613. The next prime is 81006617. The reversal of 81006614 is 41660018.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81006613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81497 + ... + 82484.

It is an arithmetic number, because the mean of its divisors is an integer number (8609055).

Almost surely, 2^81006614 is an apocalyptic number.

81006614 is a deficient number, since it is larger than the sum of its proper divisors (56738266).

81006614 is a wasteful number, since it uses less digits than its factorization.

81006614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164015.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 81006614 is about 9000.3674369439. The cubic root of 81006614 is about 432.6866473626.

The spelling of 81006614 in words is "eighty-one million, six thousand, six hundred fourteen".