78466761 has 12 divisors (see below), whose sum is σ = 114615540. Its totient is φ = 51722880.

The previous prime is 78466757. The next prime is 78466769. The reversal of 78466761 is 16766487.

It can be written as a sum of positive squares in 2 ways, for example, as 16451136 + 62015625 = 4056^2 + 7875^2 .

It is not a de Polignac number, because 78466761 - 2² = 78466757 is a prime.

It is a super-2 number, since 2×78466761² = 12314065163662242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78466769) 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, 48180 + ... + 49781.

It is an arithmetic number, because the mean of its divisors is an integer number (9551295).

Almost surely, 2^78466761 is an apocalyptic number.

It is an amenable number.

78466761 is a deficient number, since it is larger than the sum of its proper divisors (36148779).

78466761 is a wasteful number, since it uses less digits than its factorization.

78466761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98056 (or 98053 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 78466761 is about 8858.1465894396. The cubic root of 78466761 is about 428.1164431913.

The spelling of 78466761 in words is "seventy-eight million, four hundred sixty-six thousand, seven hundred sixty-one".