938466661 has 16 divisors (see below), whose sum is σ = 1035127296. Its totient is φ = 843750000.

The previous prime is 938466653. The next prime is 938466673. The reversal of 938466661 is 166664839.

It is a 9-Lehmer number, since φ(938466661) divides (938466661-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 938466661 - 2³ = 938466653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938466461) 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, 415786 + ... + 418036.

It is an arithmetic number, because the mean of its divisors is an integer number (64695456).

Almost surely, 2^938466661 is an apocalyptic number.

It is an amenable number.

938466661 is a deficient number, since it is larger than the sum of its proper divisors (96660635).

938466661 is a wasteful number, since it uses less digits than its factorization.

938466661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664.

The product of its digits is 1119744, while the sum is 49.

The square root of 938466661 is about 30634.4032257852. The cubic root of 938466661 is about 979.0531813967.

The spelling of 938466661 in words is "nine hundred thirty-eight million, four hundred sixty-six thousand, six hundred sixty-one".