40362661 has 4 divisors (see below), whose sum is σ = 40420300. Its totient is φ = 40305024.

The previous prime is 40362653. The next prime is 40362691. The reversal of 40362661 is 16626304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2232036 + 38130625 = 1494^2 + 6175^2 .

It is a cyclic number.

It is not a de Polignac number, because 40362661 - 2³ = 40362653 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 (40362691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27756 + ... + 29173.

It is an arithmetic number, because the mean of its divisors is an integer number (10105075).

Almost surely, 2^40362661 is an apocalyptic number.

It is an amenable number.

40362661 is a deficient number, since it is larger than the sum of its proper divisors (57639).

40362661 is an equidigital number, since it uses as much as digits as its factorization.

40362661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57638.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 40362661 is about 6353.1614964520. The cubic root of 40362661 is about 343.0256506584.

Adding to 40362661 its reverse (16626304), we get a palindrome (56988965).

The spelling of 40362661 in words is "forty million, three hundred sixty-two thousand, six hundred sixty-one".