66716846 has 36 divisors (see below), whose sum is σ = 119572488. Its totient is φ = 27348624.

The previous prime is 66716821. The next prime is 66716869. The reversal of 66716846 is 64861766.

66716846 = 373² + 374² + ... + 631².

It is a super-2 number, since 2×66716846² = 8902275080375432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66716797 and 66716806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1130765 + ... + 1130823.

It is an arithmetic number, because the mean of its divisors is an integer number (3321458).

Almost surely, 2^66716846 is an apocalyptic number.

66716846 is a deficient number, since it is larger than the sum of its proper divisors (52855642).

66716846 is an equidigital number, since it uses as much as digits as its factorization.

66716846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 105 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 66716846 is about 8168.0380753275. The cubic root of 66716846 is about 405.5818411380.

Multiplying 66716846 by its product of digits (290304), we get a square (19368167261184 = 4400928²).

The spelling of 66716846 in words is "sixty-six million, seven hundred sixteen thousand, eight hundred forty-six".