66401076 has 36 divisors (see below), whose sum is σ = 180233088. Its totient is φ = 18971568.

The previous prime is 66401063. The next prime is 66401077. The reversal of 66401076 is 67010466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66401077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55876 + ... + 57051.

Almost surely, 2^66401076 is an apocalyptic number.

It is an amenable number.

66401076 is an abundant number, since it is smaller than the sum of its proper divisors (113832012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66401076 is a wasteful number, since it uses less digits than its factorization.

66401076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112948 (or 112939 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 66401076 is about 8148.6855381712. The cubic root of 66401076 is about 404.9409577091.

The spelling of 66401076 in words is "sixty-six million, four hundred one thousand, seventy-six".