13672661 has 4 divisors (see below), whose sum is σ = 13793772. Its totient is φ = 13551552.

The previous prime is 13672627. The next prime is 13672663. The reversal of 13672661 is 16627631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16627631 = 3943 ⋅4217.

It can be written as a sum of positive squares in 2 ways, for example, as 2656900 + 11015761 = 1630^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 13672661 - 2¹⁴ = 13656277 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 (13672663) 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, 60386 + ... + 60611.

It is an arithmetic number, because the mean of its divisors is an integer number (3448443).

Almost surely, 2^13672661 is an apocalyptic number.

It is an amenable number.

13672661 is a deficient number, since it is larger than the sum of its proper divisors (121111).

13672661 is a wasteful number, since it uses less digits than its factorization.

13672661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121110.

The product of its digits is 9072, while the sum is 32.

The square root of 13672661 is about 3697.6561495088. The cubic root of 13672661 is about 239.1209800487.

The spelling of 13672661 in words is "thirteen million, six hundred seventy-two thousand, six hundred sixty-one".