3612301661 has 4 divisors (see below), whose sum is σ = 3824790012. Its totient is φ = 3399813312.

The previous prime is 3612301657. The next prime is 3612301673. The reversal of 3612301661 is 1661032163.

It is a happy number.

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 3083025625 + 529276036 = 55525^2 + 23006^2 .

It is a cyclic number.

It is not a de Polignac number, because 3612301661 - 2² = 3612301657 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 (3612303661) 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, 106244150 + ... + 106244183.

It is an arithmetic number, because the mean of its divisors is an integer number (956197503).

Almost surely, 2^3612301661 is an apocalyptic number.

It is an amenable number.

3612301661 is a deficient number, since it is larger than the sum of its proper divisors (212488351).

3612301661 is a wasteful number, since it uses less digits than its factorization.

3612301661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212488350.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 3612301661 is about 60102.4264152455. The cubic root of 3612301661 is about 1534.3625984129.

The spelling of 3612301661 in words is "three billion, six hundred twelve million, three hundred one thousand, six hundred sixty-one".