80620420665 has 24 divisors (see below), whose sum is σ = 136139090688. Its totient is φ = 40734525600.

The previous prime is 80620420651. The next prime is 80620420667. The reversal of 80620420665 is 56602402608.

It is not a de Polignac number, because 80620420665 - 2⁵ = 80620420633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80620420667) 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, 7438761 + ... + 7449590.

It is an arithmetic number, because the mean of its divisors is an integer number (5672462112).

Almost surely, 2^80620420665 is an apocalyptic number.

It is an amenable number.

80620420665 is a deficient number, since it is larger than the sum of its proper divisors (55518670023).

80620420665 is a wasteful number, since it uses less digits than its factorization.

80620420665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14888397 (or 14888378 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 80620420665 in words is "eighty billion, six hundred twenty million, four hundred twenty thousand, six hundred sixty-five".