78450669 has 24 divisors (see below), whose sum is σ = 125371584. Its totient is φ = 46872000.

The previous prime is 78450667. The next prime is 78450689. The reversal of 78450669 is 96605487.

78450669 is a `hidden beast` number, since 7 + 84 + 506 + 69 = 666.

It is not a de Polignac number, because 78450669 - 2¹ = 78450667 is a prime.

It is a super-2 number, since 2×78450669² = 12309014933095122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78450667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1449 + ... + 12609.

It is an arithmetic number, because the mean of its divisors is an integer number (5223816).

Almost surely, 2^78450669 is an apocalyptic number.

It is an amenable number.

78450669 is a deficient number, since it is larger than the sum of its proper divisors (46920915).

78450669 is a wasteful number, since it uses less digits than its factorization.

78450669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11249 (or 11246 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 78450669 is about 8857.2382264451. The cubic root of 78450669 is about 428.0871750837.

The spelling of 78450669 in words is "seventy-eight million, four hundred fifty thousand, six hundred sixty-nine".