2666401545 has 16 divisors (see below), whose sum is σ = 4297386240. Its totient is φ = 1411699584.

The previous prime is 2666401541. The next prime is 2666401547. The reversal of 2666401545 is 5451046662.

It is not a de Polignac number, because 2666401545 - 2² = 2666401541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2666401541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646705 + ... + 650814.

It is an arithmetic number, because the mean of its divisors is an integer number (268586640).

Almost surely, 2^2666401545 is an apocalyptic number.

It is an amenable number.

2666401545 is a deficient number, since it is larger than the sum of its proper divisors (1630984695).

2666401545 is a wasteful number, since it uses less digits than its factorization.

2666401545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297664.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 2666401545 is about 51637.2108561258. The cubic root of 2666401545 is about 1386.6765909040.

The spelling of 2666401545 in words is "two billion, six hundred sixty-six million, four hundred one thousand, five hundred forty-five".