65670401 has 4 divisors (see below), whose sum is σ = 65691204. Its totient is φ = 65649600.

The previous prime is 65670391. The next prime is 65670427. The reversal of 65670401 is 10407656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44289025 + 21381376 = 6655^2 + 4624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65670401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65670461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4580 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (16422801).

Almost surely, 2^65670401 is an apocalyptic number.

It is an amenable number.

65670401 is a deficient number, since it is larger than the sum of its proper divisors (20803).

65670401 is a wasteful number, since it uses less digits than its factorization.

65670401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20802.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 65670401 is about 8103.7275990744. The cubic root of 65670401 is about 403.4501575545.

The spelling of 65670401 in words is "sixty-five million, six hundred seventy thousand, four hundred one".