61820067 has 16 divisors (see below), whose sum is σ = 86197248. Its totient is φ = 39336000.

The previous prime is 61820051. The next prime is 61820069. The reversal of 61820067 is 76002816.

It is a happy number.

It is not a de Polignac number, because 61820067 - 2⁴ = 61820051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61820069) 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, 51223 + ... + 52415.

It is an arithmetic number, because the mean of its divisors is an integer number (5387328).

Almost surely, 2^61820067 is an apocalyptic number.

61820067 is a deficient number, since it is larger than the sum of its proper divisors (24377181).

61820067 is a wasteful number, since it uses less digits than its factorization.

61820067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 61820067 is about 7862.5738152338. The cubic root of 61820067 is about 395.4059107799.

The spelling of 61820067 in words is "sixty-one million, eight hundred twenty thousand, sixty-seven".