40951661 has 8 divisors (see below), whose sum is σ = 43775424. Its totient is φ = 38214880.

The previous prime is 40951649. The next prime is 40951681. The reversal of 40951661 is 16615904.

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 40951661 - 2⁶ = 40951597 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 (40951601) 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, 20771 + ... + 22656.

It is an arithmetic number, because the mean of its divisors is an integer number (5471928).

Almost surely, 2^40951661 is an apocalyptic number.

40951661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40951661 is a deficient number, since it is larger than the sum of its proper divisors (2823763).

40951661 is a wasteful number, since it uses less digits than its factorization.

40951661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43491.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 40951661 is about 6399.3484824629. The cubic root of 40951661 is about 344.6861558084.

The spelling of 40951661 in words is "forty million, nine hundred fifty-one thousand, six hundred sixty-one".