220664126477 has 8 divisors (see below), whose sum is σ = 220877151000. Its totient is φ = 220451160384.

The previous prime is 220664126413. The next prime is 220664126497. The reversal of 220664126477 is 774621466022.

It can be written as a sum of positive squares in 4 ways, for example, as 82234738756 + 138429387721 = 286766^2 + 372061^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 220664126477 - 2⁶ = 220664126413 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 (220664126407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12149399 + ... + 12167547.

It is an arithmetic number, because the mean of its divisors is an integer number (27609643875).

Almost surely, 2^220664126477 is an apocalyptic number.

It is an amenable number.

220664126477 is a deficient number, since it is larger than the sum of its proper divisors (213024523).

220664126477 is a wasteful number, since it uses less digits than its factorization.

220664126477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29215.

The product of its (nonzero) digits is 1354752, while the sum is 47.

The spelling of 220664126477 in words is "two hundred twenty billion, six hundred sixty-four million, one hundred twenty-six thousand, four hundred seventy-seven".