40669647 has 8 divisors (see below), whose sum is σ = 54418944. Its totient is φ = 27016728.

The previous prime is 40669631. The next prime is 40669669. The reversal of 40669647 is 74696604.

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

It is not a de Polignac number, because 40669647 - 2⁴ = 40669631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40669599 and 40669608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40669847) 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, 23103 + ... + 24800.

It is an arithmetic number, because the mean of its divisors is an integer number (6802368).

Almost surely, 2^40669647 is an apocalyptic number.

40669647 is a deficient number, since it is larger than the sum of its proper divisors (13749297).

40669647 is a wasteful number, since it uses less digits than its factorization.

40669647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48189.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 40669647 is about 6377.2758290668. The cubic root of 40669647 is about 343.8931044058.

The spelling of 40669647 in words is "forty million, six hundred sixty-nine thousand, six hundred forty-seven".