401245254321066 has 12 divisors (see below), whose sum is σ = 869364717695682. Its totient is φ = 133748418107016.

The previous prime is 401245254321053. The next prime is 401245254321071. The reversal of 401245254321066 is 660123452542104.

It is a happy number.

401245254321066 is a `hidden beast` number, since 4 + 0 + 1 + 2 + 4 + 525 + 43 + 21 + 0 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 349172014961025 + 52073239360041 = 18686145^2 + 7216179^2 .

It is a super-3 number, since 3×401245254321066³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11145701508901 + ... + 11145701508936.

Almost surely, 2^{401245254321066} is an apocalyptic number.

401245254321066 is an abundant number, since it is smaller than the sum of its proper divisors (468119463374616).

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

401245254321066 is a wasteful number, since it uses less digits than its factorization.

401245254321066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22291403017845 (or 22291403017842 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 401245254321066 in words is "four hundred one trillion, two hundred forty-five billion, two hundred fifty-four million, three hundred twenty-one thousand, sixty-six".