61669299 has 4 divisors (see below), whose sum is σ = 82225736. Its totient is φ = 41112864.

The previous prime is 61669277. The next prime is 61669301. The reversal of 61669299 is 99296616.

It is a happy number.

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

It is not a de Polignac number, because 61669299 - 2⁷ = 61669171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61669799) 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, 10278214 + ... + 10278219.

It is an arithmetic number, because the mean of its divisors is an integer number (20556434).

Almost surely, 2^61669299 is an apocalyptic number.

61669299 is a deficient number, since it is larger than the sum of its proper divisors (20556437).

61669299 is a wasteful number, since it uses less digits than its factorization.

61669299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20556436.

The product of its digits is 314928, while the sum is 48.

The square root of 61669299 is about 7852.9802622953. The cubic root of 61669299 is about 395.0842078654.

The spelling of 61669299 in words is "sixty-one million, six hundred sixty-nine thousand, two hundred ninety-nine".