66040654 has 8 divisors (see below), whose sum is σ = 99261000. Its totient is φ = 32953656.

The previous prime is 66040619. The next prime is 66040657. The reversal of 66040654 is 45604066.

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

It is a super-2 number, since 2×66040654² = 8722735961495432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66040657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32089 + ... + 34084.

It is an arithmetic number, because the mean of its divisors is an integer number (12407625).

Almost surely, 2^66040654 is an apocalyptic number.

66040654 is a deficient number, since it is larger than the sum of its proper divisors (33220346).

66040654 is a wasteful number, since it uses less digits than its factorization.

66040654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66674.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 66040654 is about 8126.5401001902. The cubic root of 66040654 is about 404.2069610775.

It can be divided in two parts, 660 and 40654, that added together give a palindrome (41314).

The spelling of 66040654 in words is "sixty-six million, forty thousand, six hundred fifty-four".