155666416 has 20 divisors (see below), whose sum is σ = 319345632. Its totient is φ = 73254656.

The previous prime is 155666377. The next prime is 155666431. The reversal of 155666416 is 614666551.

155666416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285880 + ... + 286423.

Almost surely, 2^155666416 is an apocalyptic number.

155666416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155666416 is an abundant number, since it is smaller than the sum of its proper divisors (163679216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155666416 is a wasteful number, since it uses less digits than its factorization.

155666416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572328 (or 572322 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 155666416 is about 12476.6348027022. The cubic root of 155666416 is about 537.9372793482.

The spelling of 155666416 in words is "one hundred fifty-five million, six hundred sixty-six thousand, four hundred sixteen".