665147226552 has 32 divisors (see below), whose sum is σ = 1662960410880. Its totient is φ = 221703429600.

The previous prime is 665147226551. The next prime is 665147226629. The reversal of 665147226552 is 255622741566.

It is a super-2 number, since 2×665147226552² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665147226495 and 665147226504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665147226551) 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, 323074 + ... + 1197777.

It is an arithmetic number, because the mean of its divisors is an integer number (51967512840).

Almost surely, 2^665147226552 is an apocalyptic number.

It is an amenable number.

665147226552 is an abundant number, since it is smaller than the sum of its proper divisors (997813184328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665147226552 is a wasteful number, since it uses less digits than its factorization.

665147226552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539083 (or 1539079 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 51.

The spelling of 665147226552 in words is "six hundred sixty-five billion, one hundred forty-seven million, two hundred twenty-six thousand, five hundred fifty-two".