412612661 has 4 divisors (see below), whose sum is σ = 436884012. Its totient is φ = 388341312.

The previous prime is 412612657. The next prime is 412612687. The reversal of 412612661 is 166216214.

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 342472036 + 70140625 = 18506^2 + 8375^2 .

It is a cyclic number.

It is not a de Polignac number, because 412612661 - 2² = 412612657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412612061) 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, 12135650 + ... + 12135683.

It is an arithmetic number, because the mean of its divisors is an integer number (109221003).

Almost surely, 2^412612661 is an apocalyptic number.

It is an amenable number.

412612661 is a deficient number, since it is larger than the sum of its proper divisors (24271351).

412612661 is a wasteful number, since it uses less digits than its factorization.

412612661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24271350.

The product of its digits is 3456, while the sum is 29.

The square root of 412612661 is about 20312.8693443344. The cubic root of 412612661 is about 744.4705401354.

Adding to 412612661 its reverse (166216214), we get a palindrome (578828875).

The spelling of 412612661 in words is "four hundred twelve million, six hundred twelve thousand, six hundred sixty-one".