2657661227021 has 8 divisors (see below), whose sum is σ = 2719650631104. Its totient is φ = 2595680156160.

The previous prime is 2657661226973. The next prime is 2657661227071. The reversal of 2657661227021 is 1207221667562.

2657661227021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2657661227021 is a prime.

It is a super-2 number, since 2×2657661227021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2657661227071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435700 + ... + 2715981.

It is an arithmetic number, because the mean of its divisors is an integer number (339956328888).

Almost surely, 2^{2657661227021} is an apocalyptic number.

It is an amenable number.

2657661227021 is a deficient number, since it is larger than the sum of its proper divisors (61989404083).

2657661227021 is a wasteful number, since it uses less digits than its factorization.

2657661227021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166611.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 2657661227021 in words is "two trillion, six hundred fifty-seven billion, six hundred sixty-one million, two hundred twenty-seven thousand, twenty-one".