66501623622 has 32 divisors (see below), whose sum is σ = 152035084800. Its totient is φ = 18996542208.

The previous prime is 66501623543. The next prime is 66501623659. The reversal of 66501623622 is 22632610566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45654 + ... + 367542.

It is an arithmetic number, because the mean of its divisors is an integer number (4751096400).

Almost surely, 2^66501623622 is an apocalyptic number.

66501623622 is an abundant number, since it is smaller than the sum of its proper divisors (85533461178).

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

66501623622 is a wasteful number, since it uses less digits than its factorization.

66501623622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326820.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 66501623622 in words is "sixty-six billion, five hundred one million, six hundred twenty-three thousand, six hundred twenty-two".