40661501 has 8 divisors (see below), whose sum is σ = 45319680. Its totient is φ = 36255168.

The previous prime is 40661477. The next prime is 40661503. The reversal of 40661501 is 10516604.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40661501 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 (40661503) 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, 62621 + ... + 63266.

It is an arithmetic number, because the mean of its divisors is an integer number (5664960).

Almost surely, 2^40661501 is an apocalyptic number.

It is an amenable number.

40661501 is a deficient number, since it is larger than the sum of its proper divisors (4658179).

40661501 is a wasteful number, since it uses less digits than its factorization.

40661501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125923.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40661501 is about 6376.6371231238. The cubic root of 40661501 is about 343.8701426437.

The spelling of 40661501 in words is "forty million, six hundred sixty-one thousand, five hundred one".