66346401 has 16 divisors (see below), whose sum is σ = 96998400. Its totient is φ = 40003920.

The previous prime is 66346387. The next prime is 66346409. The reversal of 66346401 is 10464366.

It is not a de Polignac number, because 66346401 - 2⁶ = 66346337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66346409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1516 + ... + 11618.

It is an arithmetic number, because the mean of its divisors is an integer number (6062400).

Almost surely, 2^66346401 is an apocalyptic number.

It is an amenable number.

66346401 is a deficient number, since it is larger than the sum of its proper divisors (30651999).

66346401 is a wasteful number, since it uses less digits than its factorization.

66346401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10316.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66346401 is about 8145.3300117306. The cubic root of 66346401 is about 404.8297836753.

The spelling of 66346401 in words is "sixty-six million, three hundred forty-six thousand, four hundred one".