401660073 has 32 divisors (see below), whose sum is σ = 610283520. Its totient is φ = 260969040.

The previous prime is 401660059. The next prime is 401660093. The reversal of 401660073 is 370066104.

401660073 is a `hidden beast` number, since 40 + 16 + 600 + 7 + 3 = 666.

It is not a de Polignac number, because 401660073 - 2⁶ = 401660009 is a prime.

It is a super-2 number, since 2×401660073² = 322661628484730658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (401660093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389068 + ... + 390098.

It is an arithmetic number, because the mean of its divisors is an integer number (19071360).

Almost surely, 2^401660073 is an apocalyptic number.

It is an amenable number.

401660073 is a deficient number, since it is larger than the sum of its proper divisors (208623447).

401660073 is a wasteful number, since it uses less digits than its factorization.

401660073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 401660073 is about 20041.4588540854. The cubic root of 401660073 is about 737.8241864226.

The spelling of 401660073 in words is "four hundred one million, six hundred sixty thousand, seventy-three".