7664186401 has 4 divisors (see below), whose sum is σ = 7871326612. Its totient is φ = 7457046192.

The previous prime is 7664186329. The next prime is 7664186419. The reversal of 7664186401 is 1046814667.

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 7199352801 + 464833600 = 84849^2 + 21560^2 .

It is a cyclic number.

It is not a de Polignac number, because 7664186401 - 2⁹ = 7664185889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664186701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103570050 + ... + 103570123.

It is an arithmetic number, because the mean of its divisors is an integer number (1967831653).

Almost surely, 2^7664186401 is an apocalyptic number.

It is an amenable number.

7664186401 is a deficient number, since it is larger than the sum of its proper divisors (207140211).

7664186401 is a wasteful number, since it uses less digits than its factorization.

7664186401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207140210.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 7664186401 is about 87545.3391163687. The cubic root of 7664186401 is about 1971.6145731084.

The spelling of 7664186401 in words is "seven billion, six hundred sixty-four million, one hundred eighty-six thousand, four hundred one".