66879345 has 16 divisors (see below), whose sum is σ = 115238592. Its totient is φ = 32925120.

The previous prime is 66879341. The next prime is 66879349. The reversal of 66879345 is 54397866.

It is an interprime number because it is at equal distance from previous prime (66879341) and next prime (66879349).

It is not a de Polignac number, because 66879345 - 2² = 66879341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66879294 and 66879303.

It is not an unprimeable number, because it can be changed into a prime (66879341) 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 15 ways as a sum of consecutive naturals, for example, 171291 + ... + 171680.

It is an arithmetic number, because the mean of its divisors is an integer number (7202412).

Almost surely, 2^66879345 is an apocalyptic number.

66879345 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66879345 is a deficient number, since it is larger than the sum of its proper divisors (48359247).

66879345 is a wasteful number, since it uses less digits than its factorization.

66879345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342992.

The product of its digits is 1088640, while the sum is 48.

The square root of 66879345 is about 8177.9792736348. The cubic root of 66879345 is about 405.9108595259.

The spelling of 66879345 in words is "sixty-six million, eight hundred seventy-nine thousand, three hundred forty-five".