401664741 has 8 divisors (see below), whose sum is σ = 548615424. Its totient is φ = 261245280.

The previous prime is 401664719. The next prime is 401664751. The reversal of 401664741 is 147466104.

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

It is not a de Polignac number, because 401664741 - 2¹⁸ = 401402597 is a prime.

It is a super-2 number, since 2×401664741² = 322669128325194162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401664751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632661 + ... + 1632906.

It is an arithmetic number, because the mean of its divisors is an integer number (68576928).

Almost surely, 2^401664741 is an apocalyptic number.

401664741 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

401664741 is a deficient number, since it is larger than the sum of its proper divisors (146950683).

401664741 is a wasteful number, since it uses less digits than its factorization.

401664741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265611.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 401664741 is about 20041.5753123351. The cubic root of 401664741 is about 737.8270446852.

The spelling of 401664741 in words is "four hundred one million, six hundred sixty-four thousand, seven hundred forty-one".