76066381 has 4 divisors (see below), whose sum is σ = 80540892. Its totient is φ = 71591872.

The previous prime is 76066379. The next prime is 76066387. The reversal of 76066381 is 18366067.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18366067 = 71 ⋅258677.

It can be written as a sum of positive squares in 2 ways, for example, as 53655625 + 22410756 = 7325^2 + 4734^2 .

It is a cyclic number.

It is not a de Polignac number, because 76066381 - 2¹ = 76066379 is a prime.

It is a super-2 number, since 2×76066381² = 11572188636874322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76066381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76066387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237230 + ... + 2237263.

It is an arithmetic number, because the mean of its divisors is an integer number (20135223).

Almost surely, 2^76066381 is an apocalyptic number.

It is an amenable number.

76066381 is a deficient number, since it is larger than the sum of its proper divisors (4474511).

76066381 is a wasteful number, since it uses less digits than its factorization.

76066381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474510.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 76066381 is about 8721.6042675645. The cubic root of 76066381 is about 423.7056463121.

The spelling of 76066381 in words is "seventy-six million, sixty-six thousand, three hundred eighty-one".