40666720137 has 8 divisors (see below), whose sum is σ = 55141315680. Its totient is φ = 26651635680.

The previous prime is 40666720103. The next prime is 40666720177. The reversal of 40666720137 is 73102766604.

It is a happy number.

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

It is not a de Polignac number, because 40666720137 - 2¹⁰ = 40666719113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40666720177) 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, 114877564 + ... + 114877917.

It is an arithmetic number, because the mean of its divisors is an integer number (6892664460).

Almost surely, 2^40666720137 is an apocalyptic number.

It is an amenable number.

40666720137 is a deficient number, since it is larger than the sum of its proper divisors (14474595543).

40666720137 is a wasteful number, since it uses less digits than its factorization.

40666720137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229755543.

The product of its (nonzero) digits is 254016, while the sum is 42.

The spelling of 40666720137 in words is "forty billion, six hundred sixty-six million, seven hundred twenty thousand, one hundred thirty-seven".