40665767 has 6 divisors (see below), whose sum is σ = 41168592. Its totient is φ = 40169012.

The previous prime is 40665761. The next prime is 40665773. The reversal of 40665767 is 76756604.

It is an interprime number because it is at equal distance from previous prime (40665761) and next prime (40665773).

It is not a de Polignac number, because 40665767 - 2¹⁴ = 40649383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40665761) 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, 3938 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (6861432).

Almost surely, 2^40665767 is an apocalyptic number.

40665767 is a deficient number, since it is larger than the sum of its proper divisors (502825).

40665767 is an frugal number, since it uses more digits than its factorization.

40665767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6069 (or 5986 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 40665767 is about 6376.9716166845. The cubic root of 40665767 is about 343.8821679313.

The spelling of 40665767 in words is "forty million, six hundred sixty-five thousand, seven hundred sixty-seven".