3661512087 has 4 divisors (see below), whose sum is σ = 4882016120. Its totient is φ = 2441008056.

The previous prime is 3661512047. The next prime is 3661512109. The reversal of 3661512087 is 7802151663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7802151663 = 3 ⋅2600717221.

It is a de Polignac number, because none of the positive numbers 2^k-3661512087 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 (3661512047) 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, 610252012 + ... + 610252017.

It is an arithmetic number, because the mean of its divisors is an integer number (1220504030).

Almost surely, 2^3661512087 is an apocalyptic number.

3661512087 is a deficient number, since it is larger than the sum of its proper divisors (1220504033).

3661512087 is a wasteful number, since it uses less digits than its factorization.

3661512087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220504032.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 3661512087 is about 60510.4295720994. The cubic root of 3661512087 is about 1541.2987423552.

The spelling of 3661512087 in words is "three billion, six hundred sixty-one million, five hundred twelve thousand, eighty-seven".