61878633 has 8 divisors (see below), whose sum is σ = 82543200. Its totient is φ = 41233248.

The previous prime is 61878617. The next prime is 61878637. The reversal of 61878633 is 33687816.

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

It is not a de Polignac number, because 61878633 - 2⁴ = 61878617 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61878637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6613 + ... + 12941.

It is an arithmetic number, because the mean of its divisors is an integer number (10317900).

Almost surely, 2^61878633 is an apocalyptic number.

It is an amenable number.

61878633 is a deficient number, since it is larger than the sum of its proper divisors (20664567).

61878633 is a wasteful number, since it uses less digits than its factorization.

61878633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9591.

The product of its digits is 145152, while the sum is 42.

The square root of 61878633 is about 7866.2972865256. The cubic root of 61878633 is about 395.5307355859.

The spelling of 61878633 in words is "sixty-one million, eight hundred seventy-eight thousand, six hundred thirty-three".