78669955 has 32 divisors (see below), whose sum is σ = 119355264. Its totient is φ = 48439296.

The previous prime is 78669949. The next prime is 78669961. The reversal of 78669955 is 55996687.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78669949) and next prime (78669961).

It is a cyclic number.

It is not a de Polignac number, because 78669955 - 2³ = 78669947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78669896 and 78669905.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14499 + ... + 19171.

It is an arithmetic number, because the mean of its divisors is an integer number (3729852).

Almost surely, 2^78669955 is an apocalyptic number.

78669955 is a deficient number, since it is larger than the sum of its proper divisors (40685309).

78669955 is a wasteful number, since it uses less digits than its factorization.

78669955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735.

The product of its digits is 4082400, while the sum is 55.

The square root of 78669955 is about 8869.6085031979. The cubic root of 78669955 is about 428.4856683690.

The spelling of 78669955 in words is "seventy-eight million, six hundred sixty-nine thousand, nine hundred fifty-five".