2661150061621 has 8 divisors (see below), whose sum is σ = 2803179144320. Its totient is φ = 2519317834272.

The previous prime is 2661150061607. The next prime is 2661150061627. The reversal of 2661150061621 is 1261600511662.

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

It is not a de Polignac number, because 2661150061621 - 2⁹ = 2661150061109 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 (2661150061627) 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, 49186080 + ... + 49240153.

It is an arithmetic number, because the mean of its divisors is an integer number (350397393040).

Almost surely, 2^{2661150061621} is an apocalyptic number.

It is an amenable number.

2661150061621 is a deficient number, since it is larger than the sum of its proper divisors (142029082699).

2661150061621 is a wasteful number, since it uses less digits than its factorization.

2661150061621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98427675.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 2661150061621 in words is "two trillion, six hundred sixty-one billion, one hundred fifty million, sixty-one thousand, six hundred twenty-one".