22661507878 has 8 divisors (see below), whose sum is σ = 34304117760. Its totient is φ = 11226801960.

The previous prime is 22661507867. The next prime is 22661507923. The reversal of 22661507878 is 87870516622.

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

It is a super-3 number, since 3×22661507878³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51975718 + ... + 51976153.

It is an arithmetic number, because the mean of its divisors is an integer number (4288014720).

Almost surely, 2^22661507878 is an apocalyptic number.

22661507878 is a deficient number, since it is larger than the sum of its proper divisors (11642609882).

22661507878 is a wasteful number, since it uses less digits than its factorization.

22661507878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103951982.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 22661507878 in words is "twenty-two billion, six hundred sixty-one million, five hundred seven thousand, eight hundred seventy-eight".