61662869 has 4 divisors (see below), whose sum is σ = 61723596. Its totient is φ = 61602144.

The previous prime is 61662863. The next prime is 61662871. The reversal of 61662869 is 96826616.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 33200644 = 5335^2 + 5762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61662869 is a prime.

It is a super-2 number, since 2×61662869² = 7604618826622322, which contains 22 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 (61662863) 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, 28814 + ... + 30879.

It is an arithmetic number, because the mean of its divisors is an integer number (15430899).

Almost surely, 2^61662869 is an apocalyptic number.

It is an amenable number.

61662869 is a deficient number, since it is larger than the sum of its proper divisors (60727).

61662869 is a wasteful number, since it uses less digits than its factorization.

61662869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60726.

The product of its digits is 186624, while the sum is 44.

The square root of 61662869 is about 7852.5708529118. The cubic root of 61662869 is about 395.0704761286.

The spelling of 61662869 in words is "sixty-one million, six hundred sixty-two thousand, eight hundred sixty-nine".