2661075121501 has 4 divisors (see below), whose sum is σ = 2661137483004. Its totient is φ = 2661012760000.

The previous prime is 2661075121493. The next prime is 2661075121513. The reversal of 2661075121501 is 1051215701662.

2661075121501 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1741940670276 + 919134451225 = 1319826^2 + 958715^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661075121501 - 2³ = 2661075121493 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 (2661075121801) 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, 31116700 + ... + 31202101.

It is an arithmetic number, because the mean of its divisors is an integer number (665284370751).

Almost surely, 2^{2661075121501} is an apocalyptic number.

It is an amenable number.

2661075121501 is a deficient number, since it is larger than the sum of its proper divisors (62361503).

2661075121501 is an equidigital number, since it uses as much as digits as its factorization.

2661075121501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62361502.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 2661075121501 in words is "two trillion, six hundred sixty-one billion, seventy-five million, one hundred twenty-one thousand, five hundred one".