40670681 has 6 divisors (see below), whose sum is σ = 43204110. Its totient is φ = 38278016.

The previous prime is 40670671. The next prime is 40670689. The reversal of 40670681 is 18607604.

It can be written as a sum of positive squares in 3 ways, for example, as 27825625 + 12845056 = 5275^2 + 3584^2 .

It is not a de Polignac number, because 40670681 - 2¹⁴ = 40654297 is a prime.

It is a super-2 number, since 2×40670681² = 3308208586007522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40670689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70076 + ... + 70653.

It is an arithmetic number, because the mean of its divisors is an integer number (7200685).

Almost surely, 2^40670681 is an apocalyptic number.

It is an amenable number.

40670681 is a deficient number, since it is larger than the sum of its proper divisors (2533429).

40670681 is a wasteful number, since it uses less digits than its factorization.

40670681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140763 (or 140746 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 40670681 is about 6377.3568976497. The cubic root of 40670681 is about 343.8960188025.

The spelling of 40670681 in words is "forty million, six hundred seventy thousand, six hundred eighty-one".