412566661 has 4 divisors (see below), whose sum is σ = 444302572. Its totient is φ = 380830752.

The previous prime is 412566599. The next prime is 412566683. The reversal of 412566661 is 166665214.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219217636 + 193349025 = 14806^2 + 13905^2 .

It is a cyclic number.

It is not a de Polignac number, because 412566661 - 2¹⁵ = 412533893 is a prime.

It is a super-2 number, since 2×412566661² = 340422499537377842, which contains 22 as substring.

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 412566661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412566061) 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, 15867936 + ... + 15867961.

It is an arithmetic number, because the mean of its divisors is an integer number (111075643).

Almost surely, 2^412566661 is an apocalyptic number.

It is an amenable number.

412566661 is a deficient number, since it is larger than the sum of its proper divisors (31735911).

412566661 is a wasteful number, since it uses less digits than its factorization.

412566661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31735910.

The product of its digits is 51840, while the sum is 37.

The square root of 412566661 is about 20311.7370256707. The cubic root of 412566661 is about 744.4428734148.

It can be divided in two parts, 412 and 566661, that multiplied together give a palindrome (233464332).

The spelling of 412566661 in words is "four hundred twelve million, five hundred sixty-six thousand, six hundred sixty-one".