61665023 has 16 divisors (see below), whose sum is σ = 72161280. Its totient is φ = 51601056.

The previous prime is 61665017. The next prime is 61665029. The reversal of 61665023 is 32056616.

It is an interprime number because it is at equal distance from previous prime (61665017) and next prime (61665029).

It is a cyclic number.

It is not a de Polignac number, because 61665023 - 2⁴ = 61665007 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61665029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128498 + ... + 128976.

It is an arithmetic number, because the mean of its divisors is an integer number (4510080).

Almost surely, 2^61665023 is an apocalyptic number.

61665023 is a deficient number, since it is larger than the sum of its proper divisors (10496257).

61665023 is a wasteful number, since it uses less digits than its factorization.

61665023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 61665023 is about 7852.7080042492. The cubic root of 61665023 is about 395.0750762600.

The spelling of 61665023 in words is "sixty-one million, six hundred sixty-five thousand, twenty-three".