66494410 has 8 divisors (see below), whose sum is σ = 119689956. Its totient is φ = 26597760.

The previous prime is 66494399. The next prime is 66494423. The reversal of 66494410 is 1449466.

It can be written as a sum of positive squares in 2 ways, for example, as 66406201 + 88209 = 8149^2 + 297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66494410² = 8843013122496200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3324711 + ... + 3324730.

Almost surely, 2^66494410 is an apocalyptic number.

66494410 is a deficient number, since it is larger than the sum of its proper divisors (53195546).

66494410 is a wasteful number, since it uses less digits than its factorization.

66494410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649448.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 66494410 is about 8154.4104630562. The cubic root of 66494410 is about 405.1305985363.

The spelling of 66494410 in words is "sixty-six million, four hundred ninety-four thousand, four hundred ten".