6540666031 has 8 divisors (see below), whose sum is σ = 6561792000. Its totient is φ = 6519561912.

The previous prime is 6540666023. The next prime is 6540666053. The reversal of 6540666031 is 1306660456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6540666031 - 2³ = 6540666023 is a prime.

It is a super-2 number, since 2×6540666031² = 85560624258154585922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540666631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761346 + ... + 769888.

It is an arithmetic number, because the mean of its divisors is an integer number (820224000).

Almost surely, 2^6540666031 is an apocalyptic number.

6540666031 is a deficient number, since it is larger than the sum of its proper divisors (21125969).

6540666031 is a wasteful number, since it uses less digits than its factorization.

6540666031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10925.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6540666031 is about 80874.3842696808. The cubic root of 6540666031 is about 1870.1394494080.

The spelling of 6540666031 in words is "six billion, five hundred forty million, six hundred sixty-six thousand, thirty-one".