66677842 has 32 divisors (see below), whose sum is σ = 132036480. Its totient is φ = 24449280.

The previous prime is 66677839. The next prime is 66677861. The reversal of 66677842 is 24877666.

It is a super-2 number, since 2×66677842² = 8891869227553928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66677792 and 66677801.

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, 10117 + ... + 15352.

It is an arithmetic number, because the mean of its divisors is an integer number (4126140).

Almost surely, 2^66677842 is an apocalyptic number.

66677842 is a deficient number, since it is larger than the sum of its proper divisors (65358638).

66677842 is a wasteful number, since it uses less digits than its factorization.

66677842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25506.

The product of its digits is 677376, while the sum is 46.

The square root of 66677842 is about 8165.6501272097. The cubic root of 66677842 is about 405.5027886506.

The spelling of 66677842 in words is "sixty-six million, six hundred seventy-seven thousand, eight hundred forty-two".