66622698 has 24 divisors (see below), whose sum is σ = 144563328. Its totient is φ = 22174632.

The previous prime is 66622693. The next prime is 66622727. The reversal of 66622698 is 89622666.

It is not an unprimeable number, because it can be changed into a prime (66622691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11815 + ... + 16517.

It is an arithmetic number, because the mean of its divisors is an integer number (6023472).

Almost surely, 2^66622698 is an apocalyptic number.

66622698 is an abundant number, since it is smaller than the sum of its proper divisors (77940630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66622698 is a wasteful number, since it uses less digits than its factorization.

66622698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5498 (or 5495 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 66622698 is about 8162.2728452313. The cubic root of 66622698 is about 405.3909713297.

The spelling of 66622698 in words is "sixty-six million, six hundred twenty-two thousand, six hundred ninety-eight".