61669099 has 4 divisors (see below), whose sum is σ = 61692840. Its totient is φ = 61645360.

The previous prime is 61669093. The next prime is 61669133. The reversal of 61669099 is 99096616.

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 61669099 - 2¹¹ = 61667051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61669093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7417 + ... + 13354.

It is an arithmetic number, because the mean of its divisors is an integer number (15423210).

Almost surely, 2^61669099 is an apocalyptic number.

61669099 is a deficient number, since it is larger than the sum of its proper divisors (23741).

61669099 is a wasteful number, since it uses less digits than its factorization.

61669099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23740.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 61669099 is about 7852.9675282660. The cubic root of 61669099 is about 395.0837807651.

The spelling of 61669099 in words is "sixty-one million, six hundred sixty-nine thousand, ninety-nine".