66779146 has 32 divisors (see below), whose sum is σ = 119070720. Its totient is φ = 27486000.

The previous prime is 66779131. The next prime is 66779171. The reversal of 66779146 is 64197766.

It is a junction number, because it is equal to n+sod(n) for n = 66779096 and 66779105.

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, 65025 + ... + 66043.

It is an arithmetic number, because the mean of its divisors is an integer number (3720960).

Almost surely, 2^66779146 is an apocalyptic number.

66779146 is a deficient number, since it is larger than the sum of its proper divisors (52291574).

66779146 is a wasteful number, since it uses less digits than its factorization.

66779146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210.

The product of its digits is 381024, while the sum is 46.

The square root of 66779146 is about 8171.8508307482. The cubic root of 66779146 is about 405.7080455842.

The spelling of 66779146 in words is "sixty-six million, seven hundred seventy-nine thousand, one hundred forty-six".