401661695 has 8 divisors (see below), whose sum is σ = 488597136. Its totient is φ = 316927296.

The previous prime is 401661679. The next prime is 401661763. The reversal of 401661695 is 596166104.

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

It is a cyclic number.

It is not a de Polignac number, because 401661695 - 2⁴ = 401661679 is a prime.

It is a super-2 number, since 2×401661695² = 322664234460546050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549857 + ... + 550586.

It is an arithmetic number, because the mean of its divisors is an integer number (61074642).

Almost surely, 2^401661695 is an apocalyptic number.

401661695 is a deficient number, since it is larger than the sum of its proper divisors (86935441).

401661695 is a wasteful number, since it uses less digits than its factorization.

401661695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100521.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 401661695 is about 20041.4993201607. The cubic root of 401661695 is about 737.8251795917.

The spelling of 401661695 in words is "four hundred one million, six hundred sixty-one thousand, six hundred ninety-five".