40665526 has 16 divisors (see below), whose sum is σ = 67457808. Its totient is φ = 18230400.

The previous prime is 40665523. The next prime is 40665551. The reversal of 40665526 is 62556604.

It is a junction number, because it is equal to n+sod(n) for n = 40665491 and 40665500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40665523) 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, 11055 + ... + 14266.

It is an arithmetic number, because the mean of its divisors is an integer number (4216113).

Almost surely, 2^40665526 is an apocalyptic number.

40665526 is a deficient number, since it is larger than the sum of its proper divisors (26792282).

40665526 is a wasteful number, since it uses less digits than its factorization.

40665526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25407.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 40665526 is about 6376.9527205398. The cubic root of 40665526 is about 343.8814886067.

It can be divided in two parts, 40 and 665526, that added together give a palindrome (665566).

The spelling of 40665526 in words is "forty million, six hundred sixty-five thousand, five hundred twenty-six".