61661067 has 8 divisors (see below), whose sum is σ = 88539024. Its totient is φ = 37945248.

The previous prime is 61661059. The next prime is 61661071. The reversal of 61661067 is 76016616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61661067 - 2³ = 61661059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61661027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790488 + ... + 790565.

It is an arithmetic number, because the mean of its divisors is an integer number (11067378).

Almost surely, 2^61661067 is an apocalyptic number.

61661067 is a deficient number, since it is larger than the sum of its proper divisors (26877957).

61661067 is a wasteful number, since it uses less digits than its factorization.

61661067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581069.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 61661067 is about 7852.4561125803. The cubic root of 61661067 is about 395.0666276541.

The spelling of 61661067 in words is "sixty-one million, six hundred sixty-one thousand, sixty-seven".