87766474 has 4 divisors (see below), whose sum is σ = 131649714. Its totient is φ = 43883236.

The previous prime is 87766457. The next prime is 87766477. The reversal of 87766474 is 47466778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47466778 = 2 ⋅23733389.

It can be written as a sum of positive squares in only one way, i.e., 65723449 + 22043025 = 8107^2 + 4695^2 .

It is not an unprimeable number, because it can be changed into a prime (87766477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21941617 + ... + 21941620.

Almost surely, 2^87766474 is an apocalyptic number.

87766474 is a deficient number, since it is larger than the sum of its proper divisors (43883240).

87766474 is a wasteful number, since it uses less digits than its factorization.

87766474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43883239.

The product of its digits is 1580544, while the sum is 49.

The square root of 87766474 is about 9368.3762733998. The cubic root of 87766474 is about 444.4022171594.

The spelling of 87766474 in words is "eighty-seven million, seven hundred sixty-six thousand, four hundred seventy-four".