420665325553 has 4 divisors (see below), whose sum is σ = 458907627888. Its totient is φ = 382423023220.

The previous prime is 420665325463. The next prime is 420665325593. The reversal of 420665325553 is 355523566024.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420665325553 is a prime.

It is a super-2 number, since 2×420665325553² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420665325593) 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, 19121151151 + ... + 19121151172.

It is an arithmetic number, because the mean of its divisors is an integer number (114726906972).

Almost surely, 2^420665325553 is an apocalyptic number.

It is an amenable number.

420665325553 is a deficient number, since it is larger than the sum of its proper divisors (38242302335).

420665325553 is a wasteful number, since it uses less digits than its factorization.

420665325553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38242302334.

The product of its (nonzero) digits is 3240000, while the sum is 46.

The spelling of 420665325553 in words is "four hundred twenty billion, six hundred sixty-five million, three hundred twenty-five thousand, five hundred fifty-three".