426660552626421 has 4 divisors (see below), whose sum is σ = 568880736835232. Its totient is φ = 284440368417612.

The previous prime is 426660552626401. The next prime is 426660552626431. The reversal of 426660552626421 is 124626255066624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 426660552626421 - 2¹⁰ = 426660552625397 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 (426660552626401) 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, 71110092104401 + ... + 71110092104406.

It is an arithmetic number, because the mean of its divisors is an integer number (142220184208808).

Almost surely, 2^{426660552626421} is an apocalyptic number.

It is an amenable number.

426660552626421 is a deficient number, since it is larger than the sum of its proper divisors (142220184208811).

426660552626421 is a wasteful number, since it uses less digits than its factorization.

426660552626421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142220184208810.

The product of its (nonzero) digits is 49766400, while the sum is 57.

The spelling of 426660552626421 in words is "four hundred twenty-six trillion, six hundred sixty billion, five hundred fifty-two million, six hundred twenty-six thousand, four hundred twenty-one".