7540666406 has 32 divisors (see below), whose sum is σ = 13961236800. Its totient is φ = 2974548096.

The previous prime is 7540666381. The next prime is 7540666423. The reversal of 7540666406 is 6046660457.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4160 + ... + 122876.

It is an arithmetic number, because the mean of its divisors is an integer number (436288650).

Almost surely, 2^7540666406 is an apocalyptic number.

7540666406 is a deficient number, since it is larger than the sum of its proper divisors (6420570394).

7540666406 is a wasteful number, since it uses less digits than its factorization.

7540666406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119088.

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 7540666406 is about 86837.0105772878. The cubic root of 7540666406 is about 1960.9653031772.

The spelling of 7540666406 in words is "seven billion, five hundred forty million, six hundred sixty-six thousand, four hundred six".