40660669 has 12 divisors (see below), whose sum is σ = 47770464. Its totient is φ = 33902064.

The previous prime is 40660667. The next prime is 40660679. The reversal of 40660669 is 96606604.

It is not a de Polignac number, because 40660669 - 2¹ = 40660667 is a prime.

It is a super-2 number, since 2×40660669² = 3306580007055122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40660667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7462 + ... + 11704.

It is an arithmetic number, because the mean of its divisors is an integer number (3980872).

Almost surely, 2^40660669 is an apocalyptic number.

It is an amenable number.

40660669 is a deficient number, since it is larger than the sum of its proper divisors (7109795).

40660669 is an equidigital number, since it uses as much as digits as its factorization.

40660669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324 (or 4287 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 40660669 is about 6376.5718846415. The cubic root of 40660669 is about 343.8677972481.

It can be divided in two parts, 406 and 60669, that added together give a triangular number (61075 = T₃₄₉).

The spelling of 40660669 in words is "forty million, six hundred sixty thousand, six hundred sixty-nine".