76661047 has 16 divisors (see below), whose sum is σ = 83681280. Its totient is φ = 70012800.

The previous prime is 76661033. The next prime is 76661063. The reversal of 76661047 is 74016667.

It is a cyclic number.

It is not a de Polignac number, because 76661047 - 2¹¹ = 76658999 is a prime.

It is a super-2 number, since 2×76661047² = 11753832254272418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76660997 and 76661015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76661017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55647 + ... + 57007.

It is an arithmetic number, because the mean of its divisors is an integer number (5230080).

Almost surely, 2^76661047 is an apocalyptic number.

76661047 is a deficient number, since it is larger than the sum of its proper divisors (7020233).

76661047 is a wasteful number, since it uses less digits than its factorization.

76661047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 76661047 is about 8755.6294462477. The cubic root of 76661047 is about 424.8069194465.

The spelling of 76661047 in words is "seventy-six million, six hundred sixty-one thousand, forty-seven".