61965671 has 4 divisors (see below), whose sum is σ = 61984032. Its totient is φ = 61947312.

The previous prime is 61965667. The next prime is 61965677. The reversal of 61965671 is 17656916.

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 61965671 - 2² = 61965667 is a prime.

It is a super-3 number, since 3×61965671³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61965677) 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, 2495 + ... + 11408.

It is an arithmetic number, because the mean of its divisors is an integer number (15496008).

Almost surely, 2^61965671 is an apocalyptic number.

61965671 is a deficient number, since it is larger than the sum of its proper divisors (18361).

61965671 is a wasteful number, since it uses less digits than its factorization.

61965671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18360.

The product of its digits is 68040, while the sum is 41.

The square root of 61965671 is about 7871.8276785001. The cubic root of 61965671 is about 395.7160988467.

The spelling of 61965671 in words is "sixty-one million, nine hundred sixty-five thousand, six hundred seventy-one".