3402511661 has 4 divisors (see below), whose sum is σ = 3402796800. Its totient is φ = 3402226524.

The previous prime is 3402511657. The next prime is 3402511691. The reversal of 3402511661 is 1661152043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1661152043 = 109 ⋅15239927.

It is a cyclic number.

It is not a de Polignac number, because 3402511661 - 2² = 3402511657 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 (3402511691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123851 + ... + 148808.

It is an arithmetic number, because the mean of its divisors is an integer number (850699200).

Almost surely, 2^3402511661 is an apocalyptic number.

It is an amenable number.

3402511661 is a deficient number, since it is larger than the sum of its proper divisors (285139).

3402511661 is a wasteful number, since it uses less digits than its factorization.

3402511661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285138.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3402511661 is about 58331.0522877824. The cubic root of 3402511661 is about 1504.0647767400.

The spelling of 3402511661 in words is "three billion, four hundred two million, five hundred eleven thousand, six hundred sixty-one".