40166035251 has 4 divisors (see below), whose sum is σ = 53554713672. Its totient is φ = 26777356832.

The previous prime is 40166035241. The next prime is 40166035279. The reversal of 40166035251 is 15253066104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40166035251 - 2⁵ = 40166035219 is a prime.

It is a super-2 number, since 2×40166035251² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40166035241) 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 3 ways as a sum of consecutive naturals, for example, 6694339206 + ... + 6694339211.

It is an arithmetic number, because the mean of its divisors is an integer number (13388678418).

Almost surely, 2^40166035251 is an apocalyptic number.

40166035251 is a deficient number, since it is larger than the sum of its proper divisors (13388678421).

40166035251 is a wasteful number, since it uses less digits than its factorization.

40166035251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13388678420.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 40166035251 in words is "forty billion, one hundred sixty-six million, thirty-five thousand, two hundred fifty-one".