2661250860399 has 16 divisors (see below), whose sum is σ = 3631292957952. Its totient is φ = 1732697980608.

The previous prime is 2661250860337. The next prime is 2661250860413. The reversal of 2661250860399 is 9930680521662.

It is not a de Polignac number, because 2661250860399 - 2⁷ = 2661250860271 is a prime.

It is a super-2 number, since 2×2661250860399² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661250860599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172899 + ... + 2313524.

It is an arithmetic number, because the mean of its divisors is an integer number (226955809872).

Almost surely, 2^{2661250860399} is an apocalyptic number.

2661250860399 is a deficient number, since it is larger than the sum of its proper divisors (970042097553).

2661250860399 is a wasteful number, since it uses less digits than its factorization.

2661250860399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494766.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 2661250860399 in words is "two trillion, six hundred sixty-one billion, two hundred fifty million, eight hundred sixty thousand, three hundred ninety-nine".