40369661 has 8 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 38169792.

The previous prime is 40369649. The next prime is 40369673. The reversal of 40369661 is 16696304.

It is an interprime number because it is at equal distance from previous prime (40369649) and next prime (40369673).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40369661 - 2⁶ = 40369597 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 (40369361) 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, 9476 + ... + 13058.

It is an arithmetic number, because the mean of its divisors is an integer number (5322240).

Almost surely, 2^40369661 is an apocalyptic number.

It is an amenable number.

40369661 is a deficient number, since it is larger than the sum of its proper divisors (2208259).

40369661 is a wasteful number, since it uses less digits than its factorization.

40369661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 40369661 is about 6353.7123793889. The cubic root of 40369661 is about 343.0454795523.

The spelling of 40369661 in words is "forty million, three hundred sixty-nine thousand, six hundred sixty-one".