61671611 has 4 divisors (see below), whose sum is σ = 61870224. Its totient is φ = 61473000.

The previous prime is 61671607. The next prime is 61671613. The reversal of 61671611 is 11617616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61671611 - 2² = 61671607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61671613) 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, 98840 + ... + 99461.

It is an arithmetic number, because the mean of its divisors is an integer number (15467556).

Almost surely, 2^61671611 is an apocalyptic number.

61671611 is a deficient number, since it is larger than the sum of its proper divisors (198613).

61671611 is a wasteful number, since it uses less digits than its factorization.

61671611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198612.

The product of its digits is 1512, while the sum is 29.

The square root of 61671611 is about 7853.1274661755. The cubic root of 61671611 is about 395.0891450778.

It can be divided in two parts, 616716 and 11, that multiplied together give a palindrome (6783876).

The spelling of 61671611 in words is "sixty-one million, six hundred seventy-one thousand, six hundred eleven".