2807666421 has 32 divisors (see below), whose sum is σ = 4319185920. Its totient is φ = 1589124096.

The previous prime is 2807666383. The next prime is 2807666441. The reversal of 2807666421 is 1246667082.

It is not a de Polignac number, because 2807666421 - 2⁷ = 2807666293 is a prime.

It is a super-2 number, since 2×2807666421² = 15765981463221898482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2807666441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1683430 + ... + 1685096.

It is an arithmetic number, because the mean of its divisors is an integer number (134974560).

Almost surely, 2^2807666421 is an apocalyptic number.

2807666421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2807666421 is a deficient number, since it is larger than the sum of its proper divisors (1511519499).

2807666421 is a wasteful number, since it uses less digits than its factorization.

2807666421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 2807666421 is about 52987.4175724766. The cubic root of 2807666421 is about 1410.7449446171.

The spelling of 2807666421 in words is "two billion, eight hundred seven million, six hundred sixty-six thousand, four hundred twenty-one".