40502665 has 12 divisors (see below), whose sum is σ = 56538756. Its totient is φ = 27773088.

The previous prime is 40502659. The next prime is 40502681. The reversal of 40502665 is 56620504.

It can be written as a sum of positive squares in 2 ways, for example, as 4177936 + 36324729 = 2044^2 + 6027^2 .

It is not a de Polignac number, because 40502665 - 2⁷ = 40502537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82414 + ... + 82903.

It is an arithmetic number, because the mean of its divisors is an integer number (4711563).

Almost surely, 2^40502665 is an apocalyptic number.

It is an amenable number.

40502665 is a deficient number, since it is larger than the sum of its proper divisors (16036091).

40502665 is a wasteful number, since it uses less digits than its factorization.

40502665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165336 (or 165329 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 40502665 is about 6364.1704094092. The cubic root of 40502665 is about 343.4218051031.

The spelling of 40502665 in words is "forty million, five hundred two thousand, six hundred sixty-five".