81066692001 has 8 divisors (see below), whose sum is σ = 110602618720. Its totient is φ = 52787613312.

The previous prime is 81066691967. The next prime is 81066692027. The reversal of 81066692001 is 10029666018.

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

It is not a de Polignac number, because 81066692001 - 2²⁵ = 81033137569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81066622001) 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, 314211856 + ... + 314212113.

It is an arithmetic number, because the mean of its divisors is an integer number (13825327340).

Almost surely, 2^81066692001 is an apocalyptic number.

It is an amenable number.

81066692001 is a deficient number, since it is larger than the sum of its proper divisors (29535926719).

81066692001 is a wasteful number, since it uses less digits than its factorization.

81066692001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628424015.

The product of its (nonzero) digits is 31104, while the sum is 39.

The spelling of 81066692001 in words is "eighty-one billion, sixty-six million, six hundred ninety-two thousand, one".