66290401 has 8 divisors (see below), whose sum is σ = 67305600. Its totient is φ = 65279760.

The previous prime is 66290381. The next prime is 66290407. The reversal of 66290401 is 10409266.

66290401 = 94² + 95² + ... + 584².

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 66290401 - 2²³ = 57901793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66290401.

It is not an unprimeable number, because it can be changed into a prime (66290407) 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, 37935 + ... + 39643.

It is an arithmetic number, because the mean of its divisors is an integer number (8413200).

Almost surely, 2^66290401 is an apocalyptic number.

It is an amenable number.

66290401 is a deficient number, since it is larger than the sum of its proper divisors (1015199).

66290401 is a wasteful number, since it uses less digits than its factorization.

66290401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66290401 is about 8141.8917334978. The cubic root of 66290401 is about 404.7158521035.

Adding to 66290401 its reverse (10409266), we get a palindrome (76699667).

The spelling of 66290401 in words is "sixty-six million, two hundred ninety thousand, four hundred one".