7266400971669 has 30 divisors (see below), whose sum is σ = 12244502724246. Its totient is φ = 4152229114320.

The previous prime is 7266400971659. The next prime is 7266400971673. The reversal of 7266400971669 is 9661790046627.

7266400971669 is a `hidden beast` number, since 7 + 2 + 66 + 400 + 9 + 7 + 166 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7023893969169 + 242507002500 = 2650263^2 + 492450^2 .

It is not a de Polignac number, because 7266400971669 - 2⁷ = 7266400971541 is a prime.

It is a super-2 number, since 2×7266400971669² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7266400971649) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 168112062 + ... + 168155279.

Almost surely, 2^{7266400971669} is an apocalyptic number.

It is an amenable number.

7266400971669 is a deficient number, since it is larger than the sum of its proper divisors (4978101752577).

7266400971669 is an equidigital number, since it uses as much as digits as its factorization.

7266400971669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336267375 (or 336267351 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

The spelling of 7266400971669 in words is "seven trillion, two hundred sixty-six billion, four hundred million, nine hundred seventy-one thousand, six hundred sixty-nine".