80807766646 has 32 divisors (see below), whose sum is σ = 130688644320. Its totient is φ = 37334131200.

The previous prime is 80807766643. The next prime is 80807766659. The reversal of 80807766646 is 64666770808.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80807766643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1086025 + ... + 1158043.

It is an arithmetic number, because the mean of its divisors is an integer number (4084020135).

Almost surely, 2^80807766646 is an apocalyptic number.

80807766646 is a deficient number, since it is larger than the sum of its proper divisors (49880877674).

80807766646 is a wasteful number, since it uses less digits than its factorization.

80807766646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72640.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 80807766646 in words is "eighty billion, eight hundred seven million, seven hundred sixty-six thousand, six hundred forty-six".