61001611166611 has 4 divisors (see below), whose sum is σ = 61001637062472. Its totient is φ = 61001585270752.

The previous prime is 61001611166603. The next prime is 61001611166651. The reversal of 61001611166611 is 11666111610016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61001611166611 - 2³ = 61001611166603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61001611166651) 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, 9016561 + ... + 14258386.

It is an arithmetic number, because the mean of its divisors is an integer number (15250409265618).

Almost surely, 2^{61001611166611} is an apocalyptic number.

61001611166611 is a deficient number, since it is larger than the sum of its proper divisors (25895861).

61001611166611 is a wasteful number, since it uses less digits than its factorization.

61001611166611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25895860.

The product of its (nonzero) digits is 7776, while the sum is 37.

Adding to 61001611166611 its reverse (11666111610016), we get a palindrome (72667722776627).

The spelling of 61001611166611 in words is "sixty-one trillion, one billion, six hundred eleven million, one hundred sixty-six thousand, six hundred eleven".