2666065401 has 32 divisors (see below), whose sum is σ = 4127781120. Its totient is φ = 1697490432.

The previous prime is 2666065373. The next prime is 2666065411. The reversal of 2666065401 is 1045606662.

It is a happy number.

It is not a de Polignac number, because 2666065401 - 2¹⁴ = 2666049017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2666065411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452265 + ... + 458121.

It is an arithmetic number, because the mean of its divisors is an integer number (128993160).

Almost surely, 2^2666065401 is an apocalyptic number.

It is an amenable number.

2666065401 is a deficient number, since it is larger than the sum of its proper divisors (1461715719).

2666065401 is a wasteful number, since it uses less digits than its factorization.

2666065401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6622 (or 6616 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2666065401 is about 51633.9558914480. The cubic root of 2666065401 is about 1386.6183172848.

The spelling of 2666065401 in words is "two billion, six hundred sixty-six million, sixty-five thousand, four hundred one".