66901620702 has 48 divisors (see below), whose sum is σ = 161015884560. Its totient is φ = 18455617152.

The previous prime is 66901620697. The next prime is 66901620703. The reversal of 66901620702 is 20702610966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66901620703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3914863 + ... + 3931914.

It is an arithmetic number, because the mean of its divisors is an integer number (3354497595).

Almost surely, 2^66901620702 is an apocalyptic number.

66901620702 is an abundant number, since it is smaller than the sum of its proper divisors (94114263858).

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

66901620702 is a wasteful number, since it uses less digits than its factorization.

66901620702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846825 (or 7846818 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 66901620702 in words is "sixty-six billion, nine hundred one million, six hundred twenty thousand, seven hundred two".