20000000076661 has 8 divisors (see below), whose sum is σ = 21836656244448. Its totient is φ = 18166422966000.

The previous prime is 20000000076649. The next prime is 20000000076839. The reversal of 20000000076661 is 16667000000002.

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

It is a cyclic number.

It is not a de Polignac number, because 20000000076661 - 2²¹ = 19999997979509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000000076061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769750695 + ... + 769776676.

It is an arithmetic number, because the mean of its divisors is an integer number (2729582030556).

Almost surely, 2^{20000000076661} is an apocalyptic number.

It is an amenable number.

20000000076661 is a deficient number, since it is larger than the sum of its proper divisors (1836656167787).

20000000076661 is a wasteful number, since it uses less digits than its factorization.

20000000076661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539528563.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 20000000076661 its reverse (16667000000002), we get a palindrome (36667000076663).

The spelling of 20000000076661 in words is "twenty trillion, seventy-six thousand, six hundred sixty-one".